Add cache to examples

To avoid waiting and re-processing of examples, I added cache to them.

app.py

@@ -130,7 +130,8 @@ with gr.Blocks() as demo:
             ],
         ],
         inputs=[text, melody, model],
-        outputs=[output]
+        outputs=[output],
+        cache_examples=True,
     )
 
 demo.launch()