[pre-commit.ci] pre-commit autoupdate (#796)
[pre-commit.ci] pre-commit autoupdate (#796)

updates:
- [github.com/pycqa/isort: 5.9.2 → 5.9.3](https://github.com/pycqa/isort/compare/5.9.2...5.9.3)

Co-authored-by: pre-commit-ci[bot] <3ea08453efb076ca910552532a53973a6527df40@users.noreply.github.com>
adamchainz/django-mysql