Update dependency xunit.runner.visualstudio to 3.1.2

Author: renovate[bot]

Tests/Directory.Build.props

@@ -17,7 +17,7 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
     <PackageReference Include="Moq" Version="4.20.72" />
     <PackageReference Include="xunit" Version="2.9.3" />
-    <PackageReference Include="xunit.runner.visualstudio" PrivateAssets="All" Version="3.0.2">
+    <PackageReference Include="xunit.runner.visualstudio" PrivateAssets="All" Version="3.1.2">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>
   </ItemGroup>