Radio buttons shouldn't allow multi-selection

From jabref created by [HoussemNasri](https://github.com/HoussemNasri): JabRef/jabref#10161

### JabRef version

Latest development branch build (please note build date below)

### Operating system

GNU / Linux

### Details on version and operating system

JabRef 100.0.0 Linux 5.14.21-150400.24.69-default amd64 Java 20.0.2 JavaFX 20+19

### Checked with the latest development build

- [X] I made a backup of my libraries before testing the latest development version.
- [X] I have tested the latest development version and the problem persists

### Steps to reproduce the behaviour

1. Go to `File > Preferences > Autocompletion`
2. Try to select multiple Name format or First name options
3. That shouldn't be possible; if you select a new option the old one should get deselected automatically

### Appendix

*Originally posted in https://github.com/JabRef/jabref/issues/9952#issuecomment-1676387610*


Start in File > Preferences > Autocompletion and reproduce the issue with the Name format and First name options. Locate the controls for those options and verify that selecting a new option automatically deselects the previous one, then retest the reported steps on Linux.

Written by the indexing model from the issue text.