Support net8 SDK in dotnet-svcutil (#5376)

Author: betmix-matt

src/dotnet-svcutil/src/dotnet-svcutil.csproj

@@ -2,7 +2,7 @@
   <PropertyGroup>
     <AssemblyVersionFile>$(IntermediateOutputPath)\$(TargetFramework)\$(MSBuildProjectName).$(TargetFramework).version.cs</AssemblyVersionFile>
   </PropertyGroup>
-  
+
   <!--Package Properties-->
   <PropertyGroup>
     <IsPackable>true</IsPackable>
@@ -19,7 +19,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFrameworks>net6.0;net7.0</TargetFrameworks>
+    <TargetFrameworks>net6.0;net7.0;net8.0</TargetFrameworks>
     <RootNamespace>Microsoft.Tools.ServiceModel.Svcutil</RootNamespace>
 
     <PackAsTool>true</PackAsTool>