[Fixbug] increase qwen2 5 online test timeout limit (#2171)

Signed-off-by: Junhong Liu <98734602+LJH-LBJ@users.noreply.github.com>
Signed-off-by: Junhong Liu <ljh_lbj@163.com>

.buildkite/test-merge.yml

@@ -188,7 +188,7 @@ steps:
             - "/fsx/hf_cache:/fsx/hf_cache"
 
   - label: "Omni Model Test"
-    timeout_in_minutes: 15
+    timeout_in_minutes: 30
     depends_on: upload-merge-pipeline
     commands:
       - export VLLM_LOGGING_LEVEL=DEBUG