fix(pre-commit): use github as flake8 source

Author: pkyosx

.pre-commit-config.yaml

@@ -23,7 +23,7 @@ repos:
     hooks:
       - id: black
         language_version: python3 # Should be a command that runs python3.6+
-  - repo: https://gitlab.com/pycqa/flake8
+  - repo: https://github.com/PyCQA/flake8
     rev: '3.9.2'
     hooks:
       - id: flake8