Update enable-defender-for-databases-azure.md

Related content regarding migration from MySQL Single Server to Flexible Server

Author: CESANU

articles/defender-for-cloud/enable-defender-for-databases-azure.md

@@ -49,6 +49,10 @@ Learn more about this Microsoft Defender plan in [Overview of Microsoft Defender
 
 1. Select **Save**
 
+## Related content
+
+- [Optional configurations after in-place migration from Azure Database for MySQL Single Server to Flexible Server] (https://learn.microsoft.com/en-us/azure/mysql/migrate/whats-happening-to-mysql-single-server#configure-microsoft-defender-for-cloud-properties-in-flexible-server).
+
 ## Next step
 
 > [!div class="nextstepaction"]