Update articles/azure-video-indexer/release-notes.md

Sentence casing

Author: Jill Grant

articles/azure-video-indexer/release-notes.md

@@ -20,7 +20,7 @@ To stay up-to-date with the most recent Azure Video Indexer developments, this a
 
 ## April 2023
 
-### Resource Health Support
+### Resource Health support
 
 Azure Video Indexer is now integrated with Azure Resource Health enabling you to see the health and availability of each of your Video Indexer resources and if needed, help with diagnosing and solving problems. You can also set alerts to be notified when your resources are affected. For more information, see [Azure Resource Health overview](../service-health/resource-health-overview.md).