update to newer gr api

app.py

@@ -31,7 +31,7 @@ examples = [['example.jpg','en']]
 css = ".output_image, .input_image {height: 40rem !important; width: 100% !important;}"
 gr.Interface(
     inference,
-    [gr.Image(type='filepath', label='Input'),gr.Dropdown(choices=['ch', 'en', 'fr', 'german', 'korean', 'japan', 'ar'], type="value", default='ch', label='language')],
+    [gr.Image(type='filepath', label='Input'),gr.Dropdown(choices=['ch', 'en', 'fr', 'german', 'korean', 'japan', 'ar'], type="value", value='ch', label='language')],
     # gr.outputs.Image(type='file', label='Output'),
     outputs=["text", "text"],
     title=title,