Bump actions/cache from 4 to 5

Bumps [actions/cache](https://github.com/actions/cache) from 4 to 5.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v4...v5)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -25,7 +25,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - name: Mount bazel caches
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             ~/.cache/bazel-repo
@@ -63,7 +63,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - name: Mount bazel caches
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             ~/.cache/bazel-repo

.github/workflows/image-check.yaml

@@ -21,7 +21,7 @@ jobs:
         uses: actions/setup-go@v6
         with:
           go-version: "1.25"
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         with:
           path: |
             ~/.cache/bazel-repo