chore(deps): bump actions/cache/restore in /.github/actions/bootstrap (#5037)

Bumps [actions/cache/restore](https://github.com/actions/cache) from 5.0.5 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/27d5ce7f107fe9357f9df03efb73ab90386fccae...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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/actions/bootstrap/action.yaml

@@ -52,7 +52,7 @@ runs:
     # ORAS cache: restore-only on non-default branches / forks
     - name: Restore ORAS cache from github actions
       if: ${{ inputs.download-test-fixture-cache == 'true' && (github.ref != format('refs/heads/{0}', github.event.repository.default_branch) || github.event.repository.fork == true) }}
-      uses: actions/cache/restore@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
+      uses: actions/cache/restore@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
       with:
         path: ${{ github.workspace }}/.tmp/oras-cache
         key: ${{ inputs.cache-key-prefix }}-oras-cache