build(deps): bump actions/cache from 3.0.11 to 4.0.2

Bumps [actions/cache](https://github.com/actions/cache) from 3.0.11 to 4.0.2.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v3.0.11...v4.0.2)

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

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

.github/workflows/jekyll.yml

@@ -14,7 +14,7 @@ jobs:
     - uses: actions/checkout@v3
 
     # Use GitHub Actions' cache to shorten build times and decrease load on servers
-    - uses: actions/cache@v3.0.11
+    - uses: actions/cache@v4.0.2
       with:
         path: vendor/bundle
         key: ${{ runner.os }}-gems-${{ hashFiles('**/Gemfile.lock') }}