Update articles/virtual-desktop/whats-new-agent.md

Co-authored-by: Heidi Lohr <[email protected]>

Author: cawerner

articles/virtual-desktop/whats-new-agent.md

@@ -28,7 +28,7 @@ New versions of the Azure Virtual Desktop Agent are installed automatically. Whe
 This update was released end of March 2023 and includes the following changes:
 
 - Health check reliability improved
-- Reliability issues in agent upgrade fixed
+- Reliability issues in agent upgrade fixed.
 - VM will be marked unhealthy when health check detects a required URL is not unblocked
 
 ## Version 1.0.6129.9100