CLN: Update .format(...) strings to f-expressions
- [x] xref  #29547
- [ ] tests added / passed
- [x] passes `black pandas`
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

Thanks - please link the issue https://github.com/pandas-dev/pandas/issues/29547 CI failures related to black

```
All done! 💥 💔 💥
2 files would be reformatted, 865 files would be left unchanged.
Checking black formatting DONE
```

Please run `black pandas` thanks @srinivasreddy 