chore(deps): bump actions/cache from 5 to 6 (#1182)

Bumps [actions/cache](https://github.com/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
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/docusaurus.yml

@@ -25,7 +25,7 @@ jobs:
           node-version: "20"
           cache: npm
       - name: Restore cache
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             .next/cache