Update app.py

app.py

@@ -29,7 +29,7 @@ def echo(message, history):
         return "category 23: PR guide and contributor notes"
     elif(message == "what is category 23?"):
         res = "category 23: PR Guides and contributor notes"
-    elif(message == "What all categories?" or message == "categories?"):
+    elif(message == "what all categories?" or message == "categories?"):
         labels = get_labels()
         res = str(labels['New_label'])
     elif(message=="total categories"):