documentation: add dom to the list of debug categories.
documentation: add dom to the list of debug categories.

lu-zero/aravis,lu-zero/aravis,AravisProject/aravis,AnilRamachandran/aravis,AravisProject/aravis,AravisProject/aravis,AnilRamachandran/aravis,AnilRamachandran/aravis,lu-zero/aravis,lu-zero/aravis,AnilRamachandran/aravis,AravisProject/aravis,lu-zero/aravis,AravisProject/aravis,AnilRamachandran/aravis