update branding to preview 4 (#35804)

Author: maumar

eng/Versions.props

@@ -2,7 +2,7 @@
   <PropertyGroup Label="Version settings">
     <VersionPrefix>10.0.0</VersionPrefix>
     <PreReleaseVersionLabel>preview</PreReleaseVersionLabel>
-    <PreReleaseVersionIteration>3</PreReleaseVersionIteration>
+    <PreReleaseVersionIteration>4</PreReleaseVersionIteration>
     <IncludeSourceRevisionInInformationalVersion>False</IncludeSourceRevisionInInformationalVersion>
     <IsServicingBuild Condition="'$(PreReleaseVersionLabel)' == 'servicing'">true</IsServicingBuild>
     <!--