docs: fix example for --with option combined with --without (#6318)

The current "Managing Dependencies" documentation contains an error at
[Installing group dependencies](https://python-poetry.org/docs/managing-dependencies/#installing-group-dependencies

)

Within the warning concerning the combined use of  `--with` and `--without` the parameters were swapped.

- [ ] Added **tests** for changed code.
- [x] Updated **documentation**

Co-authored-by: Philipp Quenzel <quenzel@dkms-lab.de>
Co-authored-by: finswimmer <finswimmer77@gmail.com>