[doc] Update list of supported tags
The updated tags come from dataimport.py lines:
- item and list L339
- languageUse L552
- dateSet L483
- functionRelation L920
- nameEntryParallel L458
- abbreviation L1131
- preferredForm L505
- useDates L485
- @functionRelationType L1006
- @latitude L800
- @longitude L799
Edited by Elodie Thiéblin