[pre-commit.ci] pre-commit autoupdate

[pre-commit-ci]

updates:

• github.com/pycqa/isort: 5.12.0 → 5.13.2

[hakonanes]

Can we make it so that these pre-commit branches are deleted upon merging (but not repo-wide)? Otherwise, we have to remember to delete them ourselves when we merge.

[pc494]

This looks, fiddly to do for a single type of PR, e.g the docs only talk about deleting them all.

One route might be to get this into a Github action, but I would probably be in favour of the maintainers (read me) being more careful and deleting when we merge.