DOC iris.csv file has moved
- [ ] closes #xxxx
- [ ] tests added / passed
- [ ] passes `black pandas`
- [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

/azp run <samp>
Azure Pipelines successfully started running 1 pipeline(s).<br>

</samp> Thanks @benabel  Resolves https://github.com/pandas-dev/pandas/issues/33428
