Bump matplotlib min_ver to 3.6.1 (from 3.6.0)
- [ ] closes #49498 (Replace xxxx with the GitHub issue number)
- [ ] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [ ] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).
- [ ] Added [type annotations](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#type-hints) to new arguments/methods/functions.
- [ ] Added an entry in the latest `doc/source/whatsnew/vX.X.X.rst` file if fixing a bug or adding a new feature.

I think this will fix the minimum-versions build.
Should `environment.yml` also be updated? Or can the documentation be updated to show up to update dependencies in a dev environment? It wasn't as easy as simply rerunning the commands [here](https://pandas.pydata.org/pandas-docs/stable/development/contributing_environment.html#creating-a-python-environment). You can use `mamba env update` to update your environment