Update fernignore

Author: PaulAsjes

.fernignore

@@ -7,6 +7,7 @@ src/elevenlabs/conversational_ai/default_audio_interface.py
 src/elevenlabs/realtime_tts.py
 src/elevenlabs/play.py
 src/elevenlabs/webhooks_custom.py
+src/elevenlabs/music_custom.py
 
 # Ignore CI files
 .github/