[forge] add a message to the summary on how to cancel a job (#14919)

Author: rustielin

.github/workflows/forge-stable.yaml

@@ -120,6 +120,7 @@ jobs:
             echo "BRANCH: [${BRANCH}](https://github.com/${{ github.repository }}/tree/${BRANCH})" >> $GITHUB_STEP_SUMMARY
           fi
           echo "IMAGE_TAG: [${IMAGE_TAG}](https://github.com/${{ github.repository }}/commit/${IMAGE_TAG})" >> $GITHUB_STEP_SUMMARY
+          echo "To cancel this job, do `pnpm infra ci cancel-workflow ${{ github.run_id }}` from internal-ops" >> $GITHUB_STEP_SUMMARY
 
   ### Real-world-network tests.
   # Run forge framework upgradability test. This is a PR required job.

.github/workflows/forge-unstable.yaml

@@ -114,6 +114,7 @@ jobs:
             echo "BRANCH: [${BRANCH}](https://github.com/${{ github.repository }}/tree/${BRANCH})" >> $GITHUB_STEP_SUMMARY
           fi
           echo "IMAGE_TAG: [${IMAGE_TAG}](https://github.com/${{ github.repository }}/commit/${IMAGE_TAG})" >> $GITHUB_STEP_SUMMARY
+          echo "To cancel this job, do `pnpm infra ci cancel-workflow ${{ github.run_id }}` from internal-ops" >> $GITHUB_STEP_SUMMARY
 
 # Test definitions start below
 # To add a new Forge test, add a new job definition below. Copy all fields and change only the: