Bump actions/cache from 3.3.2 to 4.0.0

Bumps [actions/cache](https://github.com/actions/cache) from 3.3.2 to 4.0.0.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@704facf...13aacd8)

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

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

.github/workflows/tests.yml

@@ -23,7 +23,7 @@ jobs:
 
       - name: Cache Homebrew Bundler RubyGems
         id: cache
-        uses: actions/cache@704facf57e6136b1bc63b828d79edcd491f0ee84
+        uses: actions/cache@13aacd865c20de90d75de3b17ebe84f7a17d57d2
         with:
           path: ${{ steps.set-up-homebrew.outputs.gems-path }}
           key: ${{ runner.os }}-rubygems-${{ steps.set-up-homebrew.outputs.gems-hash }}