[CI]Fix workflow (#532)

### What this PR does / why we need it?
make linux-npu-4 runner run parallel for now


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

Author: Potabk

.github/workflows/vllm_ascend_test.yaml

@@ -47,6 +47,10 @@ jobs:
       matrix:
         os: [linux-arm64-npu-1, linux-arm64-npu-4]
         vllm_verison: [main, v0.8.3]
+    concurrency:
+      group: |
+        ${{ matrix.os == 'linux-arm64-npu-4' && 'limit-npu-4' || format('job-{0}-{1}', matrix.os, matrix.vllm_verison) }}
+      cancel-in-progress: false
     name: vLLM Ascend test
     runs-on: ${{ matrix.os }}
     container: