Fix: track type in usage text

src/in_stream.liq

@@ -46,7 +46,7 @@ usage_set_track_metadata = "set_track_metadata { \
         \"timeslot_id\": -1, \
         \"playlist_id\": -1, \
         \"playlist_item\": \"\", \
-        \"track_type\": 0, \
+        \"track_type\": 1, \
         \"track_start\": \"2022/02/22 22:02:22\", \
         \"track_duration\": 303, \
         \"track_title\": \"Bar\", \