Update app.py

app.py

@@ -126,7 +126,7 @@ def generate_tts(text:str, verbose:bool = True):
 
             filename = f"{uuid4().hex}.mp3"
             filepath = os.path.join(AUDIO_DIR, filename)
-            with filepath.open('wb') as f:
+            with open(filepath, 'wb') as f:
                 for chunk_num in sorted(audio_chunks.keys()):
                     f.write(audio_chunks[chunk_num])