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

ref https://github.com/pandas-dev/pandas/issues/29547
How this failed test related to any of my changed files?
Can any of the devs help me out? thanks!