Merge pull request #836 from jupyterhub/pre-commit-ci-update-config

[pre-commit.ci] pre-commit autoupdate

Author: minrk

.pre-commit-config.yaml

@@ -26,7 +26,7 @@ repos:
 
   # Autoformat: python imports
   - repo: https://github.com/pycqa/isort
-    rev: 9.0.0a3
+    rev: 9.0.0b1
     hooks:
       - id: isort