Update config.py

Adding a new variable for vectara-agentic 2.1

config.py

@@ -5,8 +5,7 @@ load_dotenv(override=True)
 
 def get_agent_config() -> OmegaConf:
     cfg = OmegaConf.create({
-        'customer_id': str(os.environ['VECTARA_CUSTOMER_ID']),
-        'corpus_id': str(os.environ['VECTARA_CORPUS_ID']),
+        'corpus_key': str(os.environ['VECTARA_CORPUS_KEY']),
         'api_key': str(os.environ['VECTARA_API_KEY'])
     })
     return cfg