Update app.py gradio== 3.28.3

# to correct no blocks Runtime error from 2.6.4 to 3.28.3

app.py

@@ -1,7 +1,7 @@
 # to correct runtime error 01-03-2024
 import os 
 os.system("pip uninstall -y gradio")
-os.system("pip install gradio==2.6.4")
+os.system("pip install gradio==3.28.3")  # to correct no blocks Runtime error from 2.6.4 to 3.28.3
 
 import gradio as gr
 from transformers import pipeline