Update backend example.env

Author: kaustubh-darekar

backend/example.env

@@ -25,8 +25,9 @@ NEO4J_USER_AGENT = ""
 ENABLE_USER_AGENT = ""
 LLM_MODEL_CONFIG_model_version=""
 ENTITY_EMBEDDING="" True or False
-DUPLICATE_SCORE_VALUE = ""
-DUPLICATE_TEXT_DISTANCE = ""
+DUPLICATE_SCORE_VALUE =0.97
+DUPLICATE_TEXT_DISTANCE =3
+DEFAULT_DIFFBOT_CHAT_MODEL="openai_gpt_4o"  #whichever model specified here , need to add config for that model in below format)
 #examples
 LLM_MODEL_CONFIG_openai_gpt_3.5="gpt-3.5-turbo-0125,openai_api_key"
 LLM_MODEL_CONFIG_openai_gpt_4o_mini="gpt-4o-mini-2024-07-18,openai_api_key"