introspection: minor tweak to the javascript example.
introspection: minor tweak to the javascript example.

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