Add env variable for OP Jovian upgrade

Author: varasev

setup/env-variables/backend-envs-chain-specific.mdx

@@ -187,7 +187,8 @@ Supported together with ENV setting `CHAIN_TYPE=optimism`
 | `INDEXER_OPTIMISM_L1_BATCH_SUBMITTER`                | Optional. The batch submitter address to index transaction batches on L1. Used as a fallback address (when it cannot be read from the `SystemConfig` contract). Implemented in [#11073](https://github.com/blockscout/blockscout/pull/11073).                                                                                                                                                                                                                                                                                                                                 | Version: v6.10.0+ <br />Default: (empty) <br />Applications: Indexer                                     |
 | `INDEXER_OPTIMISM_L2_HOLOCENE_TIMESTAMP`             | Holocene upgrade L2 block timestamp. If not defined, EIP-1559's denominator and multiplier are taken from `EIP_1559_BASE_FEE_MAX_CHANGE_DENOMINATOR` and `EIP_1559_ELASTICITY_MULTIPLIER` envs correspondingly. Implemented in [#11355](https://github.com/blockscout/blockscout/pull/11355).                                                                                                                                                                                                                                                                                 | Version: v6.10.1+ <br />Default: (empty) <br />Applications: Indexer                                     |
 | `INDEXER_OPTIMISM_L2_HOLOCENE_BLOCKS_CHUNK_SIZE`     | Max number of blocks in `eth_getBlockByNumber` batch request. Implemented in [#11355](https://github.com/blockscout/blockscout/pull/11355).                                                                                                                                                                                                                                                                                                                                                                                                                                   | Version: v6.10.1+ <br />Default: `25` <br />Applications: Indexer                                        |
-| `INDEXER_OPTIMISM_L2_ISTHMUS_TIMESTAMP`              | Isthmus upgrade L2 block timestamp. Needed for operator fee determining. If set to `0`, the Isthmus is assumed to be active from genesis block. Implemented in [#13139](https://github.com/blockscout/blockscout/pull/13139).                                                                                                                                                                                                                                                                                                                                                 | Version: v9.2.0+ <br />Default: (empty) <br />Applications: API, Indexer                                  |
+| `INDEXER_OPTIMISM_L2_ISTHMUS_TIMESTAMP`              | Isthmus upgrade L2 block timestamp. Needed for operator fee determining. If set to `0`, the Isthmus is assumed to be active from genesis block. Implemented in [#13139](https://github.com/blockscout/blockscout/pull/13139).                                                                                                                                                                                                                                                                                                                                                 | Version: v9.2.0+ <br />Default: (empty) <br />Applications: API, Indexer                                 |
+| `INDEXER_OPTIMISM_L2_JOVIAN_TIMESTAMP`               | Jovian upgrade L2 block timestamp. If set to `0`, the Jovian is assumed to be active from genesis block. Implemented in [#13538](https://github.com/blockscout/blockscout/pull/13538).                                                                                                                                                                                                                                                                                                                                                                                        | Version: master <br />Default: (empty) <br />Applications: API, Indexer                                  |
 | `INDEXER_OPTIMISM_L2_INTEROP_START_BLOCK`            | Defines a start block number for indexing interop messages (usually `0`). If not defined, the indexing is turned off. Implemented in [#11903](https://github.com/blockscout/blockscout/pull/11903).                                                                                                                                                                                                                                                                                                                                                                           | Version: v8.0.0+ <br />Default: (empty) <br />Applications: Indexer                                      |
 | `INDEXER_OPTIMISM_L2_INTEROP_BLOCKS_CHUNK_SIZE`      | Adjusts blocks chunk size when indexing failed relay transactions. Implemented in [#11903](https://github.com/blockscout/blockscout/pull/11903).                                                                                                                                                                                                                                                                                                                                                                                                                              | Version: v8.0.0+ <br />Default: `4` <br />Applications: Indexer                                          |
 | `INDEXER_OPTIMISM_INTEROP_PRIVATE_KEY`               | 32-byte private key in form of `0x...` string. Required and used to `secp256k1` sign data being sent to `/api/v2/import/optimism/interop/` remote API endpoint. Implemented in [#11903](https://github.com/blockscout/blockscout/pull/11903).                                                                                                                                                                                                                                                                                                                                 | Version: v8.0.0+ <br />Default: (empty) <br />Applications: API, Indexer                                 |