Bump actions/cache from 3 to 4 (#679)

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

.github/workflows/check-api-changes.yml

@@ -27,7 +27,7 @@ jobs:
         shell: bash
         run: echo "::set-output name=dir::$(yarn cache dir)"
       - name: Cache yarn
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         id: yarn-cache # use this to check for `cache-hit` (`steps.yarn-cache.outputs.cache-hit != 'true'`)
         with:
           path: ${{ steps.yarn-cache-dir-path.outputs.dir }}

.github/workflows/tests.yml

@@ -51,7 +51,7 @@ jobs:
       - uses: jupyterlab/maintainer-tools/.github/actions/base-setup@v1
 
       - name: Set up browser cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: |
             ${{ github.workspace }}/pw-browsers