Update Testing framework

Author: renovate[bot]

Directory.Packages.props

@@ -14,8 +14,8 @@
   <ItemGroup Label="Library.Template">
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
     <PackageVersion Include="Microsoft.VisualStudio.Internal.MicroBuild.NonShipping" Version="$(MicroBuildVersion)" />
-    <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.3" />
-    <PackageVersion Include="xunit.v3" Version="3.0.0" />
+    <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.5" />
+    <PackageVersion Include="xunit.v3" Version="3.1.0" />
   </ItemGroup>
   <ItemGroup>
     <!-- Put repo-specific GlobalPackageReference items in this group. -->