### What this PR does / why we need it?
Update `v0.9.1rc3` doc, which are supplements to
https://github.com/vllm-project/vllm-ascend/pull/2488.
- vLLM version: v0.10.0
- vLLM main:
170e8ea9ea
Signed-off-by: Shanshan Shen <87969357+shen-shanshan@users.noreply.github.com>