Update README.md

Hi - would you mind adding the 'torchtune' tag to your README? It helps us keep track of all the cool stuff our users are doing.

Thanks for all your hard work!

README.md

@@ -7,6 +7,7 @@ license: apache-2.0
 tags:
 - sound language model
 - audio-text-to-text
+- torchtune
 ---
 
 ## Model Details