chore(ubi-rust-builder): Fail on purpose to test notification

Author: NickLarsenNZ

.github/workflows/ubi-rust-builder.yml

@@ -106,6 +106,10 @@ jobs:
           # Uses the keyless signing flow with Github Actions as identity provider
           cosign sign -y "$MANIFEST_LIST_NAME@$DIGEST"
 
+      - name: Fail on purpose
+        shell: bash
+        run: 'false'
+
   notify:
     name: Failure Notification
     needs: [build, publish_manifests]