Valid capitalization errors #32550
- [x] Fix capitalization at [Fix capitalization among headings in documentation files #32550](https://github.com/pandas-dev/pandas/issues/32550)
- [x] https://github.com/pandas-dev/pandas/blob/main/doc/source/development/contributing_docstring.rst
- [x] https://github.com/pandas-dev/pandas/blob/main/doc/source/development/contributing_documentation.rst
Thanks for the pull request, but it appears to have gone stale. If interested in continuing, please merge in the main branch, address any review comments and/or failing tests, and we can reopen.