Merge pull request #335 from sass/pre-commit-ci-update-config

[pre-commit.ci] pre-commit autoupdate

Author: asottile

.pre-commit-config.yaml

@@ -6,7 +6,7 @@ repos:
     -   id: end-of-file-fixer
     -   id: check-yaml
     -   id: debug-statements
--   repo: https://gitlab.com/pycqa/flake8
+-   repo: https://github.com/PyCQA/flake8
     rev: 3.9.0
     hooks:
     -   id: flake8