Update demos/musicgen_app.py

demos/musicgen_app.py

@@ -461,7 +461,7 @@ def ui_full(launch_kwargs):
             An overlap of 12 seconds is kept with the previously generated chunk, and 18 "new" seconds
             are generated each time.
 
-            There 10 model variations:
+            There are 10 model variations:
             1. facebook/musicgen-melody -- a music generation model capable of generating music condition
                 on text and melody inputs. **Note**, you can also use text only.
             2. facebook/musicgen-small -- a 300M transformer decoder conditioned on text only.