fix: pick correct first_round action in That's My Song

backend/experiment/rules/thats_my_song.py

@@ -55,7 +55,7 @@ def get_info_playlist(self, filename):
     def first_round(self, experiment):
         actions = super().first_round(experiment)
         # skip Consent and Playlist action
-        return [actions[0]]
+        return [actions[2]]
 
     def next_round(self, session):	
         """Get action data for the next round"""