[Docs] Add --prerelease=allow to cookbook uv install commands (#35920)

Co-authored-by: Claude Opus 5 <noreply@anthropic.com>

docs/cookbook/autoregressive/InternLM/Intern-S1.mdx

@@ -15,7 +15,7 @@ Intern-S1 includes the large **Intern-S1** MoE model and the smaller **Intern-S1
 Refer to the [official SGLang installation guide](../../../docs/get-started/install), or install from source:
 
 ```bash Command
-uv pip install 'git+https://github.com/sgl-project/sglang.git#subdirectory=python'
+uv pip install --prerelease=allow 'git+https://github.com/sgl-project/sglang.git#subdirectory=python'
 ```
 
 ## 3. Model Deployment

docs/cookbook/autoregressive/InternLM/Intern-S2-Mobius.mdx

@@ -19,7 +19,7 @@ For all methods and hardware platforms, see the [official SGLang installation gu
 ```bash Command
 pip install --upgrade pip
 pip install uv
-uv pip install sglang
+uv pip install --prerelease=allow sglang
 ```
 
 Then run the **Python** output of the command panel below in that environment.

docs/cookbook/autoregressive/InternLM/Intern-S2-Preview.mdx

@@ -20,7 +20,7 @@ Install SGLang from source or use an NVIDIA Docker image:
 
 ```bash Command
 # Install from source
-uv pip install 'git+https://github.com/sgl-project/sglang.git#subdirectory=python'
+uv pip install --prerelease=allow 'git+https://github.com/sgl-project/sglang.git#subdirectory=python'
 
 # Or use Docker for NVIDIA GPUs
 docker pull lmsysorg/sglang:latest