DOC: Added reverse rolling window examples
- [x] closes #38627
- [x] tests added / passed
- [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them
- [ ] whatsnew entry

can you merge master and update @vangorade can you merge master and update This pull request is stale because it has been open for thirty days with no activity. Please update or respond to this comment if you're still interested in working on this. Going to close this PR due to lack of activity. Let us know if you'd like to continue working on it. 