Upgrade flake8

Bump flake8 version to avoid
checking punctuation inside
strings under Python 3.12.

Author: medmunds

.pre-commit-config.yaml

@@ -8,7 +8,7 @@ repos:
     hooks:
       - id: isort
   - repo: https://github.com/pycqa/flake8
-    rev: 6.0.0
+    rev: 6.1.0
     hooks:
       - id: flake8
   - repo: https://github.com/pycqa/doc8