docs(env) : updated .env example

Author: Yash-vs9

README.md

@@ -230,14 +230,17 @@ Create a `.env` file in the root directory with the following variables:
 
 ```env
 GOOGLE_API_KEY_1=
-GOOGLE_API_KEY=
-
 GOOGLE_API_KEY_2=
 GOOGLE_API_KEY_3=
-SERPAPI_KEY=
+GOOGLE_API_KEY=
+SERPAPI_API_KEY=
 OPENROUTER_API_KEY=
 GROQ_API_KEY=
 AGENT_WORKING_DIR=
+LANGSMITH_TRACING=
+LANGSMITH_API_KEY=
+LANGSMITH_PROJECT=
+CODEGUARD_AUTO_APPROVE=1
 ```
 
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