Update branding to RTM (#50799)

Author: wtgodbe

eng/Versions.props

@@ -9,16 +9,16 @@
     <AspNetCoreMajorVersion>8</AspNetCoreMajorVersion>
     <AspNetCoreMinorVersion>0</AspNetCoreMinorVersion>
     <AspNetCorePatchVersion>0</AspNetCorePatchVersion>
-    <PreReleaseVersionIteration>2</PreReleaseVersionIteration>
+    <PreReleaseVersionIteration></PreReleaseVersionIteration>
     <ValidateBaseline>true</ValidateBaseline>
     <IdentityModelVersion>7.0.0</IdentityModelVersion>
     <!--
         When StabilizePackageVersion is set to 'true', this branch will produce stable outputs for 'Shipping' packages
     -->
     <StabilizePackageVersion Condition="'$(StabilizePackageVersion)' == ''">false</StabilizePackageVersion>
     <DotNetFinalVersionKind Condition="'$(StabilizePackageVersion)' == 'true'">release</DotNetFinalVersionKind>
-    <PreReleaseVersionLabel>rc</PreReleaseVersionLabel>
-    <PreReleaseBrandingLabel>Release Candidate $(PreReleaseVersionIteration)</PreReleaseBrandingLabel>
+    <PreReleaseVersionLabel>rtm</PreReleaseVersionLabel>
+    <PreReleaseBrandingLabel>RTM</PreReleaseBrandingLabel>
     <IncludePreReleaseLabelInPackageVersion>true</IncludePreReleaseLabelInPackageVersion>
     <IncludePreReleaseLabelInPackageVersion Condition=" '$(DotNetFinalVersionKind)' == 'release' ">false</IncludePreReleaseLabelInPackageVersion>
     <AspNetCoreMajorMinorVersion>$(AspNetCoreMajorVersion).$(AspNetCoreMinorVersion)</AspNetCoreMajorMinorVersion>