chore(deps): bump actions/cache from 4.1.2 to 4.2.0

Bumps [actions/cache](https://github.com/actions/cache) from 4.1.2 to 4.2.0.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@6849a64...1bd1e32)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/website.yml

@@ -30,7 +30,7 @@ jobs:
           cache: 'pip' # caching pip dependencies
 
       - name: Set up build cache
-        uses: actions/cache/restore@6849a6489940f00c2f30c0fb92c6274307ccb58a # v4
+        uses: actions/cache/restore@1bd1e32a3bdc45362d1e726936510720a7c30a57 # v4
         with:
           key: mkdocs-material-${{ hashfiles('.cache/**') }}
           path: .cache
@@ -45,7 +45,7 @@ jobs:
         run: mkdocs gh-deploy --force
 
       - name: Save build cache
-        uses: actions/cache/save@6849a6489940f00c2f30c0fb92c6274307ccb58a # v4
+        uses: actions/cache/save@1bd1e32a3bdc45362d1e726936510720a7c30a57 # v4
         with:
           key: mkdocs-material-${{ hashfiles('.cache/**') }}
           path: .cache