chore(deps): bump actions/cache from 1 to 4 (#690)

Bumps [actions/cache](https://github.com/actions/cache) from 1 to 4.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](https://github.com/actions/cache/compare/v1...v4)

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

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

.github/workflows/code-coverage.yml

@@ -26,7 +26,7 @@ jobs:
           toolchain: nightly
           override: true
       - name: Cache dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         env:
           cache-name: cache-dependencies
         with:

.github/workflows/update_homebrew.yml

@@ -19,7 +19,7 @@ jobs:
       uses: Homebrew/actions/setup-homebrew@master
     - name: Cache Homebrew Bundler RubyGems
       id: cache
-      uses: actions/cache@v1
+      uses: actions/cache@v4
       with:
         path: ${{ steps.set-up-homebrew.outputs.gems-path }}
         key: ${{ runner.os }}-rubygems-${{ steps.set-up-homebrew.outputs.gems-hash }}