[Doc] Update doc url link (#5781)

Drop `dev` suffix for doc url.
Rename url to `https://docs.vllm.ai/projects/ascend`

- vLLM version: v0.13.0
- vLLM main:
2f4e6548ef

Signed-off-by: wangxiyuan <wangxiyuan1007@gmail.com>

format.sh

@@ -28,7 +28,7 @@ check_command() {
         echo "pre-commit install"
         echo ""
         echo "See step by step contribution guide:"
-        echo "https://vllm-ascend.readthedocs.io/en/latest/developer_guide/contribution"
+        echo "https://docs.vllm.ai/projects/ascend/en/latest/developer_guide/contribution"
         exit 1
     fi
 }