DEPR: combine
- [x] closes #53463 (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.
- [x] Added an entry in the latest `doc/source/whatsnew/vX.X.X.rst` file if fixing a bug or adding a new feature.

Needs a "do X instead"
Would be +1 with a reasonable do X instead alternative Finding a "do X instead" is really weird bc 'update' is so weird.  For Series you could _almost_ say "operate pointwise instead" i guess Not much interest, no clear "do X instead". Closing.