DOC: Fix some RT02 issues in docstrings
- [ ] closes #xxxx (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.

Towards #49968
thanks for working on this!

looks like there's still some errors:
```
 Error: /home/runner/work/pandas/pandas/pandas/core/frame.py:4923:RT02:pandas.DataFrame.align:The first line of the Returns section should contain only the type, unless multiple values are being returned
Error: /home/runner/work/pandas/pandas/pandas/core/series.py:4643:RT02:pandas.Series.align:The first line of the Returns section should contain only the type, unless multiple values are being returned
Error: /home/runner/work/pandas/pandas/pandas/core/accessor.py:95:RT02:pandas.Series.dt.total_seconds:The first line of the Returns section should contain only the type, unless multiple values are being returned
``` Thanks @DeaMariaLeon  Thank you! 