fixing source return

app.py

@@ -96,11 +96,11 @@ def nishauri(question, conversation_history: list[str]):
         )
         reply_to_user = completion.choices[0].message.content
         conversation_history.append({"user": question, "chatbot": reply_to_user})
-        source1Return = ""
-        source2Return = ""
-        source3Return = ""
-        source4Return = ""
-        source5Return = ""
+        source1return = ""
+        source2return = ""
+        source3return = ""
+        source4return = ""
+        source5return = ""
         return reply_to_user, source1return, source2return, source3return, source4return, source5return, conversation_history
 
     # Detect language and translate if needed