chore: trigger error message

.github/workflows/continuous-integration.yaml

@@ -718,6 +718,7 @@ jobs:
           )
           && steps.conformance.outcome == 'success' 
           && !cancelled()
+          && false
         shell: bash +e {0}
         run: |
           if [[ "${{ env.IS_WEEKLY }}" == "true" ]]; then
@@ -1001,6 +1002,9 @@ jobs:
           label: ${{ needs.start-runner-linux.outputs.label-310 }}
           ec2-instance-id: ${{ needs.start-runner-linux.outputs.ec2-instance-id-310 }}
           mode: stop
+
+      - name: trigger error
+        run: exit 1
 
   build-macos-intel:
     name: Python ${{ matrix.python_version }} (macOS, intel)
@@ -1233,6 +1237,6 @@ jobs:
           SLACK_ICON: https://pbs.twimg.com/profile_images/1274014582265298945/OjBKP9kn_400x400.png
           SLACK_COLOR: 'failure'
           SLACK_TITLE: 'Stopping EC2 instances (linux) failed ❌'
-          SLACK_MESSAGE: '@machinelearning EC2 instances must be terminated manually as soon as possible'
+          SLACK_MESSAGE: '<!channel> EC2 instances must be terminated manually as soon as possible'
           SLACK_USERNAME: ${{ secrets.BOT_USERNAME }}
           SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}