ci: bump actions/cache from 5 to 6 in the github-actions group (#258)

Bumps the github-actions group with 1 update: [actions/cache](https://github.com/actions/cache).


Updates `actions/cache` from 5 to 6
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v5...v6)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Artem Demchyshyn <132658418+DemchaAV@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -274,7 +274,7 @@ jobs:
           cache: maven
 
       - name: Restore benchmark history cache
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: benchmarks/target/benchmarks/current-speed
           key: benchmark-current-speed-${{ github.ref_name }}-${{ github.run_id }}