Update release notes to include new regions

Added South Africa North and South Africa West to the release notes for Microsoft Defender for Cloud.

Author: aditdalvi

articles/defender-for-cloud/release-notes.md

@@ -60,9 +60,7 @@ Microsoft Defender for APIs and API security posture management with Defender CS
 - Switzerland West
 - Korea Central
 - Korea South
-
 - South Africa North
-
 - South Africa West
 
 Customers who have Azure API Management services in these regions can now use the capabilities offered by Microsoft Defender for APIs and API security posture management with Defender CSPM.