chore(ci): run companion-pr-check on Blacksmith (#5943)

Author: waleedlatif1

.github/workflows/companion-pr-check.yml

@@ -40,7 +40,7 @@ permissions:
 
 jobs:
   companion:
-    runs-on: ubuntu-latest
+    runs-on: ${{ (vars.CI_PROVIDER == '' || vars.CI_PROVIDER == 'blacksmith') && 'blacksmith-2vcpu-ubuntu-2404' || 'ubuntu-latest' }}
     timeout-minutes: 5
     steps:
       - uses: actions/github-script@f28e40c7f34bde8b3046d885e986cb6290c5673b # v7