DOC: Clarify ExcelFile's available engine compatibility with file types in...
information about engine compatibility and also reflect the support of the pyxlsb engine. GH34237.

DOC: I edited the available ExcelFile's docstring to add information about the recent pyxlsb engine. I also added some compatibility information between the available engines and file types.


- [x] closes #34237
- [x] tests added / passed
- [x] passes `black pandas`
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [x] whatsnew entry

The failing checks are not related to my changes. Any feedback on how I should proceed? @miguelmarques1904 fixed in https://github.com/pandas-dev/pandas/pull/34258. Merge master and push again. @TomAugspurger could you review it? The PR only has documentation improvements, fixing #34237. thanks @miguelmarques1904 