GH Actions: switch Pylint output format to "GitHub Actions"

Author: generalmimon

.github/workflows/check-style.yml

@@ -55,5 +55,4 @@ jobs:
           python -m pip install --upgrade pip
           pip install pylint setuptools
       - name: Run Pylint
-        run: |
-          pylint $(git ls-files '*.py')
+        run: pylint -f github $(git ls-files '*.py')