⬆️ Bump actions/cache from 2.1.6 to 3.2.1

Bumps [actions/cache](https://github.com/actions/cache) from 2.1.6 to 3.2.1.
- [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/v2.1.6...v3.2.1)

---
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/build.yml

@@ -20,7 +20,7 @@ jobs:
       run: make poetry-download
 
     - name: Set up cache
-      uses: actions/cache@v2.1.6
+      uses: actions/cache@v3.2.1
       with:
         path: .venv
         key: venv-${{ matrix.python-version }}-${{ hashFiles('pyproject.toml') }}-${{ hashFiles('poetry.lock') }}