Update pylint.yml (added --fail-under=3)

Author: mikekeda

.github/workflows/pylint.yml

@@ -20,4 +20,4 @@ jobs:
         pip install pylint
     - name: Analysing the code with pylint
       run: |
-        pylint $(git ls-files '*.py')
+        pylint --fail-under=3 $(git ls-files '*.py')