Update app.py

app.py

@@ -226,7 +226,7 @@ class GradioInference:
         
         # Define StuffDocumentsChain
         stuff_chain = StuffDocumentsChain(
-            llm_chain=llm_chain, document_variable_name=text
+            llm_chain=llm_chain, document_variable_name="text"
         )
         
         docs = loader.load()