ci: bump actions/setup-python from v2.1.4 to v2.2.2

Bumps [actions/setup-python](https://github.com/actions/setup-python) from v2.1.4 to v2.2.2.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v2.1.4...dc73133)

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/ci-lint.yml

@@ -31,7 +31,7 @@ jobs:
           # Fetch all history so gitlint can check the relevant commits.
           fetch-depth: '0'
       - name: Set up Python 3
-        uses: actions/setup-python@v2.1.4
+        uses: actions/setup-python@v2.2.2
         with:
           python-version: '3.x'
       - name: Set up Node.js 12