Update app.py

app.py

@@ -91,7 +91,7 @@ def generate_video():
         # Print or use lines as slides
         if len(lines)==1:
             os.remove("/app/data/video/clip0.mp4")
-            os.remove("/app/data/sound/audio0.mp4")
+            os.remove("/app/data/sound/audio0.mp3")
             #image_folder="/tmp/images"
             #image_olst=[]
             #create_text_image(lines[0],0,image_olst)