DOC: Update numeric.py
changed set to list as it is more appropriate

- [x] closes #36239 
- [x] tests added / passed
- [x] passes `black pandas`
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

Since this is now a duplicate of the other PR I think it can be closed? > Since this is now a duplicate of the other PR I think it can be closed?

How long should it take to get published in the release? 29 September ?? The changes in the other PR would likely be reflected in 1.2 which is slated for end of November, but I don't know if that's a firm date. Closing this as a duplicate of the other.