Fix link for native chat completion support (#196)

Updated link to native chat completion support in SGLang documentation.

Author: JustinTong0323

blog/2025-08-27-gpt-oss.md

@@ -102,7 +102,7 @@ which achieves:
 
 ## Powering Agentic Applications 🤖
 
-To better enable agentic workflows, SGLang offers [OpenAI Response API support](https://docs.sglang.ai/basic_usage/gpt_oss.html#responses-api) and [native chat completion support](https://docs.sglang.ai/advanced_features/function_calling.html#). Here is an example of how to build a simple web search agent with SGLang (`python3.12` and `gpt-oss` package are required for built-in tools, more setup details can be found [here](https://docs.sglang.ai/basic_usage/gpt_oss.html#responses-api)).
+To better enable agentic workflows, SGLang offers [OpenAI Response API support](https://docs.sglang.ai/basic_usage/gpt_oss.html#responses-api) and [native chat completion support](https://docs.sglang.ai/advanced_features/tool_parser.html). Here is an example of how to build a simple web search agent with SGLang (`python3.12` and `gpt-oss` package are required for built-in tools, more setup details can be found [here](https://docs.sglang.ai/basic_usage/gpt_oss.html#responses-api)).
 
 Launch the server: