ci(deps): 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/tests.yml

@@ -29,7 +29,7 @@ jobs:
 
     - name: Restore bubblewrap from cache
       id: cache-bwrap
-      uses: actions/cache/restore@v4
+      uses: actions/cache/restore@v5
       with:
         path: /tmp/bwrap-bin
         key: bwrap-${{ runner.os }}-${{ steps.bwrap-commit.outputs.commit }}
@@ -60,7 +60,7 @@ jobs:
 
     - name: Save bubblewrap to cache
       if: steps.cache-bwrap.outputs.cache-hit != 'true'
-      uses: actions/cache/save@v4
+      uses: actions/cache/save@v5
       with:
         path: /tmp/bwrap-bin
         key: bwrap-${{ runner.os }}-${{ steps.bwrap-commit.outputs.commit }}