Update app.py

app.py

@@ -122,10 +122,10 @@ def setup_multiple_chains():
 
     cl.user_session.set("api_chain", api_chain)
 
-    requests_wrapper = JsonRequestsWrapper(     
+    requests_wrapper = TextRequestsWrapper(     
         headers={
             "Authorization": auth_token,
-            "Content-Type": "application/json"
+            "content_type": "application/json"
         }
     )