Add GChat notification for scheduled release failure

Issue gh-50

Author: sjohnr

.github/workflows/update-scheduled-release-version.yml

@@ -13,6 +13,8 @@ on:
         required: false
       GH_ACTIONS_REPO_TOKEN:
         required: true
+      SPRING_SECURITY_CI_GCHAT_WEBHOOK_URL:
+        required: true
 
 env:
   GRADLE_ENTERPRISE_CACHE_USERNAME: ${{ secrets.GRADLE_ENTERPRISE_CACHE_USER }}
@@ -60,3 +62,11 @@ jobs:
           git tag $VERSION
           git push
           git push origin $VERSION
+      - name: Send Notification
+        if: failure()
+        uses: spring-io/spring-security-release-tools/.github/actions/send-notification@v1
+        with:
+          webhook-url: ${{ secrets.SPRING_SECURITY_CI_GCHAT_WEBHOOK_URL }}
+          status: ${{ job.status }}
+          build-scan-url: ${{ steps.build-and-publish.outputs.build-scan-url }}
+          run-name: ${{ format('spring-security/{0}', github.ref_name) }}