add yamllint again

.github/workflows/ci.yml

@@ -14,6 +14,27 @@ defaults:
 
 jobs:
 
+ lint:
+   name: Lint
+   runs-on: ubuntu-latest
+   steps:
+     - name: Check out the codebase.
+       uses: actions/checkout@v2
+       with:
+         path: 'geerlingguy.kubernetes'
+
+     - name: Set up Python 3.
+       uses: actions/setup-python@v2
+       with:
+         python-version: '3.x'
+
+     - name: Install test dependencies.
+       run: pip3 install yamllint
+
+     - name: Lint code.
+       run: |
+         yamllint .
+
   molecule:
     name: Molecule
     runs-on: ubuntu-latest