Changed 'int' type to 'integer' in to_numeric docstring
- [x] closes #35760 
- [ ] tests added / passed
- [ ] passes `black pandas`
- [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

Thanks @edwardkong. The docstring for SparseArray also seems to've been changed in error by the same PR, can you fix that here also? i'll add this to the 1.1.1 milestone as effectively a regression in the docs. feel free to change if disagree > can you also revert the changes to pandas/core/arrays/sparse/array.py made in #33093

Thanks @edwardkong Since I want to make sure this is fixed for 1.1.1 I pushed this change.  @jreback ok to merge (and backport) Thanks @edwardkong 