[Doc] update --system for transformers installation in docker doc (#15616)

Signed-off-by: reidliu41 <reid201711@gmail.com>
Co-authored-by: reidliu41 <reid201711@gmail.com>

docs/source/deployment/docker.md

@@ -34,11 +34,11 @@ If you need to use those dependencies (having accepted the license terms),
 create a custom Dockerfile on top of the base image with an extra layer that installs them:
 
 ```Dockerfile
-FROM vllm/vllm-openai:v0.8.0
+FROM vllm/vllm-openai:v0.8.2
 
 # e.g. install the `audio` and `video` optional dependencies
 # NOTE: Make sure the version of vLLM matches the base image!
-RUN uv pip install vllm[audio,video]==0.8.0
+RUN uv pip install --system vllm[audio,video]==0.8.2
 ```
 
 :::
@@ -52,7 +52,7 @@ with an extra layer that installs their code from source:
 ```Dockerfile
 FROM vllm/vllm-openai:latest
 
-RUN uv pip install git+https://github.com/huggingface/transformers.git
+RUN uv pip install --system git+https://github.com/huggingface/transformers.git
 ```
 
 :::