Update to v4.6.2 GitHub release notes

Signed-off-by: Jonathon Anderson <[email protected]>

Author: anderbubble

.github/releases/v4.6.2.md

@@ -1,6 +1,9 @@
-Warewulf v4.6.2 is a regularly-scheduled minor release in the v4.6.x series.
+Warewulf v4.6.2 was intended to be a regularly-scheduled minor release in the
+v4.6.x series, but its release was delayed to include a preview of the ability
+to provision node images to local disk, an alternative to provisioning to
+volatile memory.
 
-- support for provisioning to local disk
+- (preview) support for provisioning to local disk
 - improvements to the REST API
 - removal of gRPC API infrastructure
 - other misc. documentation and bug fixes