Bump actions/cache from 2 to 3 in /.github/workflows

Bumps [actions/cache](https://github.com/actions/cache) from 2 to 3.
- [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/v2...v3)

---
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/mocha.yml

@@ -23,7 +23,7 @@ jobs:
           node-version: '${{ matrix.node }}'
       - uses: actions/checkout@v2
       - name: 'Cache node_modules'
-        uses: actions/cache@v2
+        uses: actions/cache@v3
         with:
           path: ~/.npm
           key: ${{ runner.os }}-node-v${{ matrix.node }}-${{ hashFiles('**/package-lock.json') }}