updates runner for dco check

Author: madhav-db

.github/workflows/dco-check.yml

@@ -4,7 +4,9 @@ on: [pull_request]
 
 jobs:
   check:
-    runs-on: ubuntu-latest
+    runs-on:
+        group: databricks-protected-runner-group
+        labels: linux-ubuntu-latest
     steps:
       - name: Check for DCO
         id: dco-check