Update app.py

app.py

@@ -2,7 +2,7 @@
 import os, requests, json
 
 #Summarization endpoint
-def get_completion(inputs, parameters=None, ENDPOINT_URL=os.environ['HF_API_SUMMARY_BASE']): 
+def get_completion(inputs, parameters=None, ENDPOINT_URL="shleifer/distilbart-cnn-12-6"): 
     headers = {
       "Authorization": f"Bearer {hf_api_key}",
       "Content-Type": "application/json"