Update audio processing state: next_index=20

processing_audio_state.json

@@ -1,5 +1,5 @@
 {
-  "next_download_index": 19,
+  "next_download_index": 20,
   "file_states": {
     "audio/\u5982\u4f55\u6fc0\u6d3b\u5b57\u5e55.wav": "failed",
     "audio/week08 11 space switching.wav": "failed",
@@ -20,6 +20,6 @@
     "audio/week07 04 one way of building a muscle pt2.wav": "failed",
     "audio/week07 03 one way of building a muscle pt1.wav": "failed",
     "audio/week07 02 looking at reference.wav": "failed",
-    "audio/week07 01 intro what do muscles do.wav": "processing"
+    "audio/week07 01 intro what do muscles do.wav": "failed"
   }
 }