Update audio processing state: next_index=178

processing_audio_state.json

@@ -173,6 +173,7 @@
     "audio/Week 3 - 0 Intro.wav": "processed",
     "audio/Week 2 - 6 Recap & Homework.wav": "processed",
     "audio/Week 2 - 5 Blockout.wav": "processed",
-    "audio/Week 2 - 4 Intro to Blender.wav": "processed"
+    "audio/Week 2 - 4 Intro to Blender.wav": "processed",
+    "audio/Week 2 - 3 Reference Final.wav": "processing"
   }
 }