[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/PyCQA/flake8: 3.9.2 → 4.0.1](PyCQA/flake8@3.9.2...4.0.1)

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -10,7 +10,7 @@ repos:
   hooks:
   - id: black
 - repo: https://github.com/PyCQA/flake8
-  rev: "3.9.2"
+  rev: "4.0.1"
   hooks:
   - id: flake8
 - repo: https://github.com/PyCQA/isort