Pin flake8 runtime to Python 3.11 in pre-commit

This is since it explodes under Python 3.12
due to [[1]] currently.

[1]: wemake-services/wemake-python-styleguide#2933

Author: webknjaz

.pre-commit-config.yaml

@@ -121,7 +121,7 @@ repos:
       ^docs/_samples/.*\.py$
     files: >-
       ^.*\.p(xd|y|yx)$
-    language_version: python3
+    language_version: python3.11  # flake8-commas doesn't work w/ Python 3.12
     types:
     - file