TST: ro_replace changing dtype of series
- closes #25797
- Tests added and passed
@phofl and @noatamir 
👋  @pooja-subramaniam 
The pre-commit errors will be fixed if you:
1. Replace your single quotes with double quotes
2. Add a new line at the end of the file (after your test)

If you want, you can have a look at the details link to see what the errors look like, so you can identify them next time 😉.

In the future, I recommend making a feature branch in your fork, rather than making a PR from your fork's main branch. You can find guidance for this in our documentation ([here)](https://pandas.pydata.org/docs/dev/development/contributing.html#creating-a-branch). thanks for the points @noatamir! @noatamir I don't understand the reason for the canceled check here. Do you know why that happened? thx @pooja-subramaniam 