Fix build warning generated during WPF XAML target

Author: hymccord

src/GitVersion.MsBuild/msbuild/tools/GitVersion.MsBuild.props

@@ -54,6 +54,12 @@
         -->
         <GenerateGitVersionInformation Condition=" '$(GenerateGitVersionInformation)' == '' And '$(_TargetAssemblyProjectName)' != '' ">false</GenerateGitVersionInformation>
         <GenerateGitVersionInformation Condition=" '$(GenerateGitVersionInformation)' == '' ">true</GenerateGitVersionInformation>
+        <!--
+          Compounding on the previous "GenerateTemporaryTargetAssembly" explanation, "UpdateAssemblyInfo" is
+          also called in this temp-build. This results in a warning since we already updated assembly info.
+          Prevent UpdateAssemblyInfo from running a second time.
+        -->
+        <UpdateAssemblyInfo Condition=" '$(UpdateAssemblyInfo)' == 'true' And '$(_TargetAssemblyProjectName)' != '' ">false</UpdateAssemblyInfo>
 
         <!-- Property that enables GetVersion -->
         <GetVersion Condition=" '$(DisableGitVersionTask)' == 'true' ">false</GetVersion>