[pre-commit.ci] pre-commit autoupdate (#2031)
[pre-commit.ci] pre-commit autoupdate (#2031)

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

Co-authored-by: pre-commit-ci[bot] <3ea08453efb076ca910552532a53973a6527df40@users.noreply.github.com>
Co-authored-by: Isaac Virshup <d9d96763d10860478ad8c9f5058054d5cd289745@gmail.com>
theislab/scanpy,theislab/scanpy