Adding new how-to Create alerts

Adding new how-to Create alerts

Author: danimir

articles/sql-database/toc.yml

@@ -815,7 +815,9 @@
       href: sql-database-managed-instance-threat-detection.md
     - name: Connect applications
       href: sql-database-managed-instance-connect-app.md
-
+    - name: Create alerts
+      href: sql-database-managed-instance-alerts.md
+      
   - name: Samples
     items:
     - name: Azure CLI