.NET 10 P6 - Containers (#9942)

* Add period to last sentence in containers preview6 release notes.

* update to none udpates.

Author: jamesmontemagno

release-notes/10.0/preview/preview6/containers.md

@@ -1,9 +1,3 @@
 # Container image updates in .NET 10 Preview 6 - Release Notes
 
-Here's a summary of what's new in container images in this preview release:
-
-- [Feature](#feature)
-
-## Feature
-
-Something about the feature
+This preview release does not contain new Container image features.