[Doc] Recommend uv and python 3.12 for quickstart guide (#11849)

Signed-off-by: mgoin <[email protected]>

docs/source/getting_started/quickstart.md

@@ -15,10 +15,19 @@ This guide will help you quickly get started with vLLM to perform:
 ## Installation
 
 If you are using NVIDIA GPUs, you can install vLLM using [pip](https://pypi.org/project/vllm/) directly.
-It's recommended to use [conda](https://docs.conda.io/projects/conda/en/latest/user-guide/getting-started.html) to create and manage Python environments.
+
+It's recommended to use [uv](https://docs.astral.sh/uv/), a very fast Python environment manager, to create and manage Python environments. Please follow the [documentation](https://docs.astral.sh/uv/#getting-started) to install `uv`. After installing `uv`, you can create a new Python environment and install vLLM using the following commands:
+
+```console
+$ uv venv myenv --python 3.12 --seed
+$ source myenv/bin/activate
+$ uv pip install vllm
+```
+
+You can also use [conda](https://docs.conda.io/projects/conda/en/latest/user-guide/getting-started.html) to create and manage Python environments.
 
 ```console
-$ conda create -n myenv python=3.10 -y
+$ conda create -n myenv python=3.12 -y
 $ conda activate myenv
 $ pip install vllm
 ```