Merge pull request #5340 from jbampton/use-certified-actions

refactor: only use certified GitHub Actions to increase security

.github/workflows/lint.yml

@@ -8,8 +8,18 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+        with:
+          python-version: '3.x'  # Version range or exact version of a Python version to use, using SemVer's version range syntax
+          architecture: 'x64'  # optional x64 or x86. Defaults to x64 if not specified
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install yamllint
       - name: 🧹 YAML Lint
-        uses: ibiqlik/action-yamllint@v3
+        run: |
+          # return non-zero exit code on warnings
+          yamllint --strict .
   markdownlint:
     name: 🍸 Markdown
     runs-on: ubuntu-latest