Merge pull request #1507 from jupyter/pre-commit-ci-update-config

[pre-commit.ci] pre-commit autoupdate

Author: mathbunnyru

.pre-commit-config.yaml

@@ -12,7 +12,7 @@ repos:
 
   # Autoformat: Python code
   - repo: https://github.com/psf/black
-    rev: 21.9b0
+    rev: 21.10b0
     hooks:
       - id: black
         args: [--target-version=py39]