Switch flake8 from gitlab to github (#858)

Author: RedTachyon

.pre-commit-config.yaml

@@ -11,7 +11,7 @@ repos:
         args:
           - --skip=*.css,*.js,*.map,*.scss,*svg
           - --ignore-words-list=magent
-  - repo: https://gitlab.com/PyCQA/flake8
+  - repo: https://github.com/PyCQA/flake8
     rev: 5.0.4
     hooks:
       - id: flake8