mouse cc genes option should be added to documentation

[JarneBelien]

A .tsv with mouse cc genes is provided on the git and it's presence is acknowledged in the documentation in one place.

However, might be of added value to mention the way to use it in the documentation in two other locations:

• ingestion yaml
• mouse ingestion tutorial

[bio-la]

Hi @giuliaelgarcia , do you have an update on this? thank you!