[pre-commit.ci] pre-commit autoupdate (#2249)

updates:
- [github.com/psf/black: 21.9b0 → 21.10b0](psf/black@21.9b0...21.10b0)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -35,7 +35,7 @@ repos:
       - id: python-check-blanket-noqa
         name: Precision flake ignores
   - repo: https://github.com/psf/black
-    rev: 21.9b0
+    rev: 21.10b0
     hooks:
       - id: black
   - repo: https://github.com/asottile/blacken-docs