Bump the pip-dependencies group with 4 updates

Bumps the pip-dependencies group with 4 updates: [xarray](https://github.com/pydata/xarray), [mypy](https://github.com/python/mypy), [black](https://github.com/psf/black) and [moto](https://github.com/getmoto/moto).


Updates `xarray` from 2023.9.0 to 2023.10.1
- [Release notes](https://github.com/pydata/xarray/releases)
- [Changelog](https://github.com/pydata/xarray/blob/main/HOW_TO_RELEASE.md)
- [Commits](pydata/xarray@v2023.09.0...v2023.10.1)

Updates `mypy` from 1.6.0 to 1.6.1
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.6.0...v1.6.1)

Updates `black` from 23.9.1 to 23.10.0
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](psf/black@23.9.1...23.10.0)

Updates `moto` from 4.2.5 to 4.2.6
- [Release notes](https://github.com/getmoto/moto/releases)
- [Changelog](https://github.com/getmoto/moto/blob/master/CHANGELOG.md)
- [Commits](getmoto/moto@4.2.5...4.2.6)

---
updated-dependencies:
- dependency-name: xarray
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: pip-dependencies
- dependency-name: mypy
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: pip-dependencies
- dependency-name: black
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: pip-dependencies
- dependency-name: moto
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: pip-dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>