Should not provide hard-coded OLLAMA_API_BASE_URL value in .env.example

.env.example

@@ -27,7 +27,7 @@ GOOGLE_GENERATIVE_AI_API_KEY=
 
 # You only need this environment variable set if you want to use oLLAMA models
 # EXAMPLE http://localhost:11434
-OLLAMA_API_BASE_URL=http://localhost:11434
+OLLAMA_API_BASE_URL=
 
 # You only need this environment variable set if you want to use OpenAI Like models
 OPENAI_LIKE_API_BASE_URL=