Bump actions/cache from 3 to 4 (#1223)

Bumps [actions/cache](https://github.com/actions/cache) from 3 to 4.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v3...v4)

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

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

.github/workflows/test.yml

@@ -159,7 +159,7 @@ jobs:
           bundler-cache: true
           rubygems: ${{ steps.rubygems.outputs.version }}
       - name: Cache Appraisal gems
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: gemfiles/vendor/bundle
           key: v1-bundler-${{ runner.os }}-${{ matrix.ruby }}-${{ hashFiles('Gemfile.lock', 'gemfiles/*.gemfile.lock') }}