GA(deps): Bump haskell-actions/setup from 2.11 to 2.12

Bumps [haskell-actions/setup](https://github.com/haskell-actions/setup) from 2.11 to 2.12.
- [Release notes](https://github.com/haskell-actions/setup/releases)
- [Commits](haskell-actions/setup@v2.11...v2.12)

---
updated-dependencies:
- dependency-name: haskell-actions/setup
  dependency-version: '2.12'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -67,7 +67,7 @@ jobs:
     steps:
     - uses: actions/checkout@v7
 
-    - uses: haskell-actions/setup@v2.11
+    - uses: haskell-actions/setup@v2.12
       id: setup-haskell-cabal
       name: Setup Haskell
       with: