FIX: Resolve KeyError with LaTeX headers in to_latex method
- [x] closes #60063 
- [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.

This is not a sensible fix. It is a hard coded direct string replacement for the exact issue presented. What about the flip case where the user actually wants to display what they have input and **don't** expect it to be directly replaced by your fix?

I will take a look at the underlying issue but I am not entirely convinced it even warrants a fix yet. Yeah you are right. I did not consider this case. Thank you for your feedback. Appears it may be too early to submit a PR at this point so closing