Update april-2024.md

Author: xboxeer

articles/mysql/flexible-server/release-notes/april-2024.md

@@ -19,7 +19,7 @@ All existing engine version server upgrades to 8.0.36 engine version.
 To check your engine version, run `SELECT VERSION();` command at the MySQL prompt
 
 ## Features
-### Microsoft Defender for Cloud 
+### [Microsoft Defender for Cloud](https://learn.microsoft.com/en-us/azure/defender-for-cloud/defender-for-databases-introduction) 
 - Introducing Defender for Cloud support to simplify security management with threat protection from anomalous database activities in Azure Database for MySQL flexible server instances.
 
 ## Improvement