Upgrade the flake8 pre-commit hook to latest

Author: kurtmckee

.pre-commit-config.yaml

@@ -9,7 +9,7 @@ repos:
       - id: black
         args: [ '--safe' ]
   - repo: https://github.com/pycqa/flake8
-    rev: 4.0.1
+    rev: 6.0.0
     hooks:
       - id: flake8
         args: [