ci(deps): bump actions/cache from 4 to 6 (#5614)

Bumps [actions/cache](https://github.com/actions/cache) from 4 to 6.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v4...v6)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/benchmark.yml

@@ -45,7 +45,7 @@ jobs:
         uses: dtolnay/rust-toolchain@stable
 
       - name: Cache cargo
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry
@@ -210,7 +210,7 @@ jobs:
         uses: dtolnay/rust-toolchain@stable
 
       - name: Cache cargo
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry

.github/workflows/cache-warm.yml

@@ -69,7 +69,7 @@ jobs:
       # (`sccache-<os>-perry-`). This runs on main, so the saved entry is
       # main-scoped → restorable by every PR. run_id keeps the key unique.
       - name: Cache sccache objects
-        uses: actions/cache@v4
+        uses: actions/cache@v6
         with:
           path: ${{ github.workspace }}/.sccache
           key: sccache-${{ runner.os }}-perry-warm-${{ github.run_id }}

.github/workflows/container-tests.yml

@@ -97,7 +97,7 @@ jobs:
         uses: dtolnay/rust-toolchain@stable
 
       - name: Cache cargo registry
-        uses: actions/cache@v4
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry
@@ -170,7 +170,7 @@ jobs:
         uses: dtolnay/rust-toolchain@stable
 
       - name: Cache cargo registry
-        uses: actions/cache@v4
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry
@@ -211,7 +211,7 @@ jobs:
         uses: dtolnay/rust-toolchain@stable
 
       - name: Cache cargo registry
-        uses: actions/cache@v4
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry
@@ -253,7 +253,7 @@ jobs:
         uses: dtolnay/rust-toolchain@stable
 
       - name: Cache cargo registry
-        uses: actions/cache@v4
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry

.github/workflows/simctl-tests.yml

@@ -38,7 +38,7 @@ jobs:
         run: rustup target add aarch64-apple-ios-sim aarch64-apple-ios
 
       - name: Cache cargo
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry

.github/workflows/test.yml

@@ -150,7 +150,7 @@ jobs:
       # cache from ANY of them. The object cache therefore warms continuously
       # and cross-pollinates instead of starting cold each run.
       - name: Cache sccache objects
-        uses: actions/cache@v4
+        uses: actions/cache@v6
         with:
           path: ${{ github.workspace }}/.sccache
           key: sccache-${{ runner.os }}-perry-${{ github.job }}-${{ github.run_id }}
@@ -261,7 +261,7 @@ jobs:
       # cache from ANY of them. The object cache therefore warms continuously
       # and cross-pollinates instead of starting cold each run.
       - name: Cache sccache objects
-        uses: actions/cache@v4
+        uses: actions/cache@v6
         with:
           path: ${{ github.workspace }}/.sccache
           key: sccache-${{ runner.os }}-perry-${{ github.job }}-${{ github.run_id }}
@@ -494,7 +494,7 @@ jobs:
       # cache from ANY of them. The object cache therefore warms continuously
       # and cross-pollinates instead of starting cold each run.
       - name: Cache sccache objects
-        uses: actions/cache@v4
+        uses: actions/cache@v6
         with:
           path: ${{ github.workspace }}/.sccache
           key: sccache-${{ runner.os }}-perry-${{ github.job }}-${{ github.run_id }}