Merge pull request #34 from beeware/autoupdates/pre-commit/black

Bump black from 23.7.0 to 23.9.0

Author: freakboy3742

.pre-commit-config.yaml

@@ -20,7 +20,7 @@ repos:
       - id: pyupgrade
         args: [--py38-plus]
   - repo: https://github.com/psf/black
-    rev: 23.7.0
+    rev: 23.9.0
     hooks:
     - id: black
   - repo: https://github.com/PyCQA/flake8