[router] use 2-gpu-runner (#2368)

.github/workflows/pr-test-rust.yml

@@ -42,7 +42,7 @@ jobs:
 
   e2e-rust:
     if: github.repository == 'sgl-project/sglang' || github.event_name == 'pull_request'
-    runs-on: 1-gpu-runner
+    runs-on: 2-gpu-runner
     steps:
       - name: Checkout code
         uses: actions/checkout@v3