[pre-commit.ci] pre-commit autoupdate (#406)

updates:
- [github.com/psf/black: 21.8b0 → 21.10b0](psf/black@21.8b0...21.10b0)

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

.pre-commit-config.yaml

@@ -16,7 +16,7 @@ repos:
     exclude: docs/tutorials
 
 - repo: https://github.com/psf/black
-  rev: "21.8b0"
+  rev: "21.10b0"
   hooks:
   - id: black