[Metax]Update ci_metax.yml (#7963)

Author: plusNew001

.github/workflows/ci_metax.yml

@@ -18,7 +18,7 @@ concurrency:
 jobs:
   trigger-jenkins:
     name: Trigger Jenkins for PR
-    runs-on: [self-hosted, XPU-P800]
+    runs-on: ubuntu-latest
     environment: Metax_ci
 
     steps: