Update dependency Microsoft.NET.Test.Sdk to 18.3.0

Author: renovate[bot]

Directory.Packages.props

@@ -43,7 +43,7 @@
   </ItemGroup>
   <Import Project="Directory.Packages.Analyzers.props" Condition="'$(IsTestProject)'!='true' and '$(MSBuildProjectName)'!='CsWin32Generator'" />
   <ItemGroup Label="Library.Template">
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.0.0" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
     <PackageVersion Include="Microsoft.VisualStudio.Internal.MicroBuild.NonShipping" Version="$(MicroBuildVersion)" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.5" />
     <PackageVersion Include="xunit.v3" Version="3.1.0" />