Update app.py

app.py

@@ -64,7 +64,7 @@ def make_filename(inp):
         first_name=inp[:20]
     print(first_name)
     last_name=random.randint(1,1111111111)
-    filename=first_name+last_name
+    filename=first_name+str(last_name)
     return filename
 def get_screenshot(chat,css_in,w,h):