Update hist.py
Minor improvement, allowing inference of the xlabel for a histgram plotted using a Series.

Reduces these lines of code:
```
ax=ds.hist()
ax.set(
    xlabel=ds.name,
)
``` 
to 
```
ds.hist()
``` 
---
- [NA] closes #xxxx (Replace xxxx with the GitHub issue number)
- [NA] [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
- [NA] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).
- [NA] Added [type annotations](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#type-hints) to new arguments/methods/functions.
- [NA] Added an entry in the latest `doc/source/whatsnew/vX.X.X.rst` file if fixing a bug or adding a new feature.

Thanks for the pull request, but it appears to have gone stale. If interested in continuing, please merge in the main branch, address any review comments and/or failing tests, and we can reopen. No worries. If anyone stumbles on this, there is a wrapper package called `roux` which implements this shortcut.
Demo: https://github.com/rraadd88/roux/blob/323b076ee5649cfcb7b99a1ba5be700a2a9cf0db/examples/roux_viz_ds.ipynb