Preview 1 branding

Author: marcpopMSFT

eng/Versions.props

@@ -5,7 +5,7 @@
     <StabilizePackageVersion Condition="'$(StabilizePackageVersion)' == ''">false</StabilizePackageVersion>
     <DotNetFinalVersionKind Condition="'$(StabilizePackageVersion)' == 'true'">release</DotNetFinalVersionKind>
     <!-- Calculate prerelease label -->
-    <PreReleaseVersionLabel Condition="'$(StabilizePackageVersion)' != 'true'">alpha</PreReleaseVersionLabel>
+    <PreReleaseVersionLabel Condition="'$(StabilizePackageVersion)' != 'true'">preview</PreReleaseVersionLabel>
     <PreReleaseVersionLabel Condition="'$(StabilizePackageVersion)' == 'true' and $(VersionPrefix.EndsWith('00'))">rtm</PreReleaseVersionLabel>
     <PreReleaseVersionLabel Condition="'$(StabilizePackageVersion)' == 'true' and !$(VersionPrefix.EndsWith('00'))">servicing</PreReleaseVersionLabel>
     <PreReleaseVersionIteration Condition="'$(StabilizePackageVersion)' != 'true'">1</PreReleaseVersionIteration>