DOC: Added note for `corr` 
- [ ] closes #49939 
- [ ] 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.
@MarcoGorelli please review this when possible. /preview Website preview of this PR available at: https://pandas.pydata.org/preview/53972/ just waiting for the preview to load, then I'll check that the rendered docs look alright, then hopefully we can merge Sure @MarcoGorelli 
 I tried building this page using 
`python make.py --single pandas.Series.corr`
But that doesn't seem to build this page. Can you please guide me on what I am missing? @MarcoGorelli  don't know, can you check the contributing guide for documentation please? @MarcoGorelli can you please check the docs?