[Doc] Upgrade docker run command (#3645)

### What this PR does / why we need it?
Update the docker run command, specifically: add --shm-size=1g
### Does this PR introduce _any_ user-facing change?
users/developers using docker to pull vllm-ascend, the shared memory of
the container will be increased from the default 64MB to 1G

### How was this patch tested?

- vLLM version: v0.11.0rc3
- vLLM main: https://github.com/vllm-project/vllm/commit/v0.11.0

Signed-off-by: wangli <wangli858794774@gmail.com>

docs/source/quick_start.md

@@ -23,6 +23,7 @@ export DEVICE=/dev/davinci0
 export IMAGE=quay.io/ascend/vllm-ascend:|vllm_ascend_version|
 docker run --rm \
 --name vllm-ascend \
+--shm-size=1g \
 --device $DEVICE \
 --device /dev/davinci_manager \
 --device /dev/devmm_svm \
@@ -52,6 +53,7 @@ export DEVICE=/dev/davinci0
 export IMAGE=quay.io/ascend/vllm-ascend:|vllm_ascend_version|-openeuler
 docker run --rm \
 --name vllm-ascend \
+--shm-size=1g \
 --device $DEVICE \
 --device /dev/davinci_manager \
 --device /dev/devmm_svm \