Added Python 3.13 to pyproject.toml in classifiers
- [ ] closes ##59978- added "'Programming Language :: Python :: 3.13'," to pyproject.toml 
- [ ] tests not needed for updating pyproject.toml in classifiers
- [ ] In the middle of installing code checks. If necessary will reinstall and resub my ticket if necessary
- [ ] New type annotations not necessary
- [ ] Not adding new feature

Thanks for the PR but as you mentioned in https://github.com/pandas-dev/pandas/issues/59978#issuecomment-2401058203 there's already an open PR for this issue so closing