CI: Use conda-forge to create Python 3.10 env
- [ ] closes #xxxx
- [ ] tests added / passed
- [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them
- [ ] whatsnew entry

Anaconda messed up their recipe :(. Fixes the sdist job.
LGTM

should we expect an upstream fix at some point?  do we revert this at that point? thanks @lithomas1  @meeseeksdev backport 1.3.x Something went wrong ... Please have  a look at my logs. > LGTM
> 
> should we expect an upstream fix at some point? do we revert this at that point?

Probably. No need to revert this one, though, since we really should be using conda-forge's stuff for everything. 