Fix links in the docs (#1878)

docs/backend/backend.md

@@ -20,7 +20,7 @@ curl http://localhost:30000/generate \
   }'
 ```
 
-Learn more about the argument specification, streaming, and multi-modal support [here](https://sgl-project.github.io/sampling_params.html).
+Learn more about the argument specification, streaming, and multi-modal support [here](https://sgl-project.github.io/references/sampling_params.html).
 
 ## OpenAI Compatible API
 In addition, the server supports OpenAI-compatible APIs.
@@ -74,7 +74,7 @@ python -m sglang.launch_server --model-path meta-llama/Meta-Llama-3-8B-Instruct
 ```
 python -m sglang.launch_server --model-path meta-llama/Meta-Llama-3-8B-Instruct --mem-fraction-static 0.7
 ```
-- See [hyperparameter tuning](https://sgl-project.github.io/hyperparameter_tuning.html) on tuning hyperparameters for better performance.
+- See [hyperparameter tuning](https://sgl-project.github.io/references/hyperparameter_tuning.html) on tuning hyperparameters for better performance.
 - If you see out-of-memory errors during prefill for long prompts, try to set a smaller chunked prefill size.
 ```
 python -m sglang.launch_server --model-path meta-llama/Meta-Llama-3-8B-Instruct --chunked-prefill-size 4096
@@ -161,7 +161,7 @@ You can view the full example [here](https://github.com/sgl-project/sglang/tree/
 - gte-Qwen2
   - `python -m sglang.launch_server --model-path Alibaba-NLP/gte-Qwen2-7B-instruct --is-embedding`
 
-Instructions for supporting a new model are [here](https://sgl-project.github.io/model_support.html).
+Instructions for supporting a new model are [here](https://sgl-project.github.io/references/model_support.html).
 
 ### Use Models From ModelScope
 <details>

docs/references/custom_chat_template.md

-.. _custom-chat-template:
-
 # Custom Chat Template in SGLang Runtime
 
 **NOTE**: There are two chat template systems in SGLang project. This document is about setting a custom chat template for the OpenAI-compatible API server (defined at [conversation.py](https://github.com/sgl-project/sglang/blob/main/python/sglang/srt/conversation.py)). It is NOT related to the chat template used in the SGLang language frontend (defined at [chat_template.py](https://github.com/sgl-project/sglang/blob/main/python/sglang/lang/chat_template.py)).

docs/references/faq.md

-Here’s the text with corrected grammar and refined phrasing in U.S. English:
-
 # Frequently Asked Questions
 
 ## The results are not deterministic, even with a temperature of 0
@@ -14,4 +12,4 @@ We are still investigating the root causes and potential solutions. In the short
 
 We have two issues to track our progress:
 - The deterministic mode is tracked at [https://github.com/sgl-project/sglang/issues/1729](https://github.com/sgl-project/sglang/issues/1729).
-- The per-request random seed is tracked at [https://github.com/sgl-project/sglang/issues/1335](https://github.com/sgl-project/sglang/issues/1335).
\ No newline at end of file
+- The per-request random seed is tracked at [https://github.com/sgl-project/sglang/issues/1335](https://github.com/sgl-project/sglang/issues/1335).

docs/references/sampling_params.md

-.. _sampling-parameters:
-
 # Sampling Parameters in SGLang Runtime
 This doc describes the sampling parameters of the SGLang Runtime.
 It is the low-level endpoint of the runtime.