[demo] fix zh-

app.py

@@ -180,7 +180,7 @@ with demo:
     with gr.Tabs():
         with gr.TabItem("Microphone Recording"):
             language_mic = gr.Radio(
-                ["English", "English-Mandarin", "Japanese", "Korean", "Thai", "Italian", "German"], 
+                ["English", "Mandarin", "Japanese", "Korean", "Thai", "Italian", "German"], 
                 label="Select Language", 
                 value="English"
             )
@@ -202,7 +202,7 @@ with demo:
             def transcribe_mic(audio, lang):
                 lang_map = {
                     "English": "<eng>", 
-                    "Chinese": "<zho>", 
+                    "Mandarin": "<zho>", 
                     "Japanese": "<jpn>", 
                     "Korean": "<kor>",
                     "Thai": "<tha>",