DOC: Add docstring validations for "See Also" section
- [x] closes #23135 
- [x] tests added / passed
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`

Hello @getschomp! Thanks for submitting the PR.

 - There are no PEP8 issues in the file [`scripts/tests/test_validate_docstrings.py`](https://github.com/getschomp/pandas/blob/d3313cd9e4a4c0f3a3c648233b22ecea1e2b4afe/scripts/tests/test_validate_docstrings.py) !

 - There are no PEP8 issues in the file [`scripts/validate_docstrings.py`](https://github.com/getschomp/pandas/blob/d3313cd9e4a4c0f3a3c648233b22ecea1e2b4afe/scripts/validate_docstrings.py) !

 # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/23143?src=pr&el=h1) Report
> Merging [#23143](https://codecov.io/gh/pandas-dev/pandas/pull/23143?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/85dc1713bc6a1064f4afdf2a907bc9c72cdc364b?src=pr&el=desc) will **increase** coverage by `<.01%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/23143/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/23143?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #23143      +/-   ##
==========================================
+ Coverage   92.13%   92.13%   +<.01%     
==========================================
  Files         170      170              
  Lines       51073    51077       +4     
==========================================
+ Hits        47056    47060       +4     
  Misses       4017     4017
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `90.56% <ø> (ø)` | :arrow_up: |
| #single | `42.28% <ø> (-0.01%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/23143?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/io/formats/style.py](https://codecov.io/gh/pandas-dev/pandas/pull/23143/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL2Zvcm1hdHMvc3R5bGUucHk=) | `96.69% <0%> (+0.03%)` | :arrow_up: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/23143?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/23143?src=pr&el=footer). Last update [85dc171...6901171](https://codecov.io/gh/pandas-dev/pandas/pull/23143?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 Thanks, @datapythonista, made changes as requested. Thanks, @datapythonista, any word @WillAyd? Thanks @getschomp nice PR!