chore(deps): bump actions/cache/restore from 4.2.3 to 6.1.0

Bumps [actions/cache/restore](https://github.com/actions/cache) from 4.2.3 to 6.1.0.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](https://github.com/actions/cache/compare/5a3ec84eff668545956fd18022155c47e93e2684...55cc8345863c7cc4c66a329aec7e433d2d1c52a9)

---
updated-dependencies:
- dependency-name: actions/cache/restore
  dependency-version: 6.1.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/nvidia-integration.yml

@@ -63,7 +63,7 @@ jobs:
       # invalidates it; restore-keys still serves the last image for the distro.
       - name: Restore cached base cloud image
         id: img-cache
-        uses: actions/cache/restore@5a3ec84eff668545956fd18022155c47e93e2684 # v4.2.3
+        uses: actions/cache/restore@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
         with:
           path: ~/.cache/distrobox-vmtest
           key: qcow2-${{ matrix.distro }}-${{ hashFiles('hack/test/vm-run.sh') }}