Update app.py

app.py

@@ -10,7 +10,7 @@ language_dict = tts_order_voice
 async def text_to_speech_edge(text, language_code):
     voice = language_dict[language_code]
     communicate = edge_tts.Communicate(text, voice)
-    with tempfile.NamedTemporaryFile(delete=False, suffix=".mp3") as tmp_file:
+    with tempfile.NamedTemporaryFile(delete=False, suffix=".wav") as tmp_file:
         tmp_path = tmp_file.name
 
     await communicate.save(tmp_path)