Update app.py

app.py

@@ -114,8 +114,8 @@ def summarize_pdf(pdf_file, api_key,
   map_reduce_chain = load_summarize_chain(
     gpt_llm,
     chain_type="map_reduce",
-    map_prompt=map_prompt,
-    combine_prompt=combine_prompt,
+    map_prompt=map_template,
+    combine_prompt=combine_template,
     return_intermediate_steps=True,
     token_max=3840 # limit the maximum number of tokens in the combined document (combine prompt).
   )