DOC: fix PR02 errors in docstrings - pandas.Series.interpolate, pandas.read_hdf, pandas.HDFStore.append
All PR02 Errors resolved in the following cases:

1. scripts/validate_docstrings.py --format=actions --errors=PR02 pandas.Series.interpolate     
2. scripts/validate_docstrings.py --format=actions --errors=PR02 pandas.read_hdf      
3. scripts/validate_docstrings.py --format=actions --errors=PR02 pandas.HDFStore.append 

OUTPUT:

1. scripts/validate_docstrings.py --format=actions --errors=PR02 pandas.Series.interpolate     
```
################################################################################
################################## Validation ##################################
################################################################################

Docstring for "pandas.Series.interpolate" correct. :)
```

2. scripts/validate_docstrings.py --format=actions --errors=PR02 pandas.read_hdf      
```
################################################################################
################################## Validation ##################################
################################################################################

Docstring for "pandas.read_hdf" correct. :)
```

3. scripts/validate_docstrings.py --format=actions --errors=PR02 pandas.HDFStore.append 
```
################################################################################
################################## Validation ##################################
################################################################################

8 Errors found for `pandas.HDFStore.append`:
	PR01	Parameters {'complib', 'complevel', 'axes', 'columns', 'errors'} not documented
	PR07	Parameter "key" has no description
	PR07	Parameter "min_itemsize" has no description
	PR07	Parameter "nan_rep" has no description
	PR07	Parameter "chunksize" has no description
	PR07	Parameter "expectedrows" has no description
	PR07	Parameter "encoding" has no description
	SA01	See Also section not found
```


- [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 