Update branding for 300

Author: marcpopMSFT

eng/Versions.props

@@ -1,7 +1,7 @@
 <Project>
   <Import Project="Version.Details.props" Condition="Exists('Version.Details.props')" />
   <PropertyGroup>
-    <VersionPrefix>10.0.200</VersionPrefix>
+    <VersionPrefix>10.0.300</VersionPrefix>
     <!-- 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>