DOC: updated required dependencies list
- [x] closes #54492 
- [x] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).
@alimcmaster1 tagging as reviewer @MarcoGorelli could you remind me why we added tzdata as a required dependency? > @MarcoGorelli could you remind me why we added tzdata as a required dependency?

added here https://github.com/pandas-dev/pandas/pull/51247  > @MarcoGorelli could you remind me why we added tzdata as a required dependency?

Think its a PEP 615 thing - zoneinfo only works on certain platforms.
https://peps.python.org/pep-0615/#abstract Right but I'm curious why we didn't make this dependency platform specific On my phone, but IIRC that was a request from @lithomas1  I don't think it's necessary on all platforms but doesn't hurt.

We are able to enforce that tzdata exists (the db isn't guaranteed to exist on all platforms) and also enforce a minimum version by putting it as a dep. Thanks @rsm-23 