DOC: df.to_html documentation incorrectly contains min_rows optional param
- [x] closes #44304
- [x] tests added / passed
- [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them
- [NA] whatsnew entry

Moved min_rows parameter out of the common docstring that is used by both DataFrame.to_html and DataFrame.to_string and reintroduced the parameter in DataFrame.to_string only