Switch to utm_source/medium/campaign tracking for GA4

README.md

@@ -16,7 +16,7 @@ language:
 
 > Compare GPT-4o vs Claude vs Gemini vs DeepSeek — same prompt, same API, side by side.
 
-One of the biggest advantages of [Crazyrouter](https://crazyrouter.com/?ref=huggingface) is the ability to test multiple models instantly. No separate accounts, no different SDKs. Just change the model name.
+One of the biggest advantages of [Crazyrouter](https://crazyrouter.com/?utm_source=huggingface&utm_medium=tutorial&utm_campaign=dev_community) is the ability to test multiple models instantly. No separate accounts, no different SDKs. Just change the model name.
 
 ---
 
@@ -213,7 +213,7 @@ for model, price in PRICING.items():
 
 ## Links
 
-- 🌐 [Crazyrouter](https://crazyrouter.com/?ref=huggingface)
+- 🌐 [Crazyrouter](https://crazyrouter.com/?utm_source=huggingface&utm_medium=tutorial&utm_campaign=dev_community)
 - 📖 [Getting Started](https://huggingface.co/xujfcn/Crazyrouter-Getting-Started)
 - 🔗 [LangChain Guide](https://huggingface.co/xujfcn/Crazyrouter-LangChain-Guide)
 - 💰 [Pricing](https://huggingface.co/spaces/xujfcn/Crazyrouter-Pricing)