Bump actions/cache/save from 5.0.5 to 6.1.0

Bumps [actions/cache/save](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](actions/cache@27d5ce7...55cc834)

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

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

Author: dependabot[bot]

.github/workflows/test-integration-unreleased.yml

@@ -64,7 +64,7 @@ jobs:
 
       - name: Save cached build
         if: steps.cache-restore.outputs.cache-hit != 'true'
-        uses: actions/cache/save@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5
+        uses: actions/cache/save@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v5
         with:
           path: opensearch/distribution/archives/linux-tar/build/distributions
           key: ${{ steps.get-key.outputs.key }}