Grouping dependabot PRs do not work

### Before submitting the issue

- [X] I have searched among the existing issues
- [X] I am using a Python virtual environment
- [X] I have a fully updated virtual environment (i.e. ``pip install --upgrade --upgrade-strategy eager ansys-mapdl-core``)

### Description of the bug

As the title.

Proves:

* #1638 
* #1574 

