DOC: fix PR02 errors in docstrings - pandas.core.window.rolling.Rolling.quantile, pandas.core.window.expanding.Expanding.quantile
All PR02 Errors resolved in the following cases:

1. scripts/validate_docstrings.py --format=actions --errors=PR02 pandas.core.window.rolling.Rolling.quantile
2. scripts/validate_docstrings.py --format=actions --errors=PR02 pandas.core.window.expanding.Expanding.quantile

OUTPUT:

1. scripts/validate_docstrings.py --format=actions --errors=PR02 pandas.core.window.rolling.Rolling.quantile
```
################################################################################
################################## Validation ##################################
################################################################################

5 Errors found for `pandas.core.window.rolling.Rolling.quantile`:
	ES01	No extended summary found
	SA05	pandas.Series.rolling in `See Also` section does not need `pandas` prefix, use Series.rolling instead.
	SA05	pandas.DataFrame.rolling in `See Also` section does not need `pandas` prefix, use DataFrame.rolling instead.
	SA05	pandas.Series.quantile in `See Also` section does not need `pandas` prefix, use Series.quantile instead.
	SA05	pandas.DataFrame.quantile in `See Also` section does not need `pandas` prefix, use DataFrame.quantile instead.
```

2. scripts/validate_docstrings.py --format=actions --errors=PR02 pandas.core.window.expanding.Expanding.quantile
```
################################################################################
################################## Validation ##################################
################################################################################

5 Errors found for `pandas.core.window.expanding.Expanding.quantile`:
	ES01	No extended summary found
	SA05	pandas.Series.expanding in `See Also` section does not need `pandas` prefix, use Series.expanding instead.
	SA05	pandas.DataFrame.expanding in `See Also` section does not need `pandas` prefix, use DataFrame.expanding instead.
	SA05	pandas.Series.quantile in `See Also` section does not need `pandas` prefix, use Series.quantile instead.
	SA05	pandas.DataFrame.quantile in `See Also` section does not need `pandas` prefix, use DataFrame.quantile instead.
```

- [x] xref https://github.com/pandas-dev/pandas/issues/57111
- [x] [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
- [x] 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.

Thanks @jordan-d-murphy, nice update