[Check_rec] |Check the level of title #24
Description
In check_rec, if there are titles, check that there is no level 1 title (#) and at least one level 2 title (##).
The typical case to avoid is when we have only level 3 titles (###).
See remark:
https://forum.camptocamp.org/t/topoguide-verifications-automatiques/201480/1089?u=antoinem