build(deps): update dependency xunit.runner.visualstudio to 3.1.2

Author: renovate[bot]

tests/Directory.Packages.props

@@ -15,6 +15,6 @@
     <PackageVersion Include="System.Formats.Asn1" Version="6.0.1" />
     <PackageVersion Include="xunit" Version="2.9.3" />
     <PackageVersion Include="Xunit.Combinatorial" Version="1.6.24" />
-    <PackageVersion Include="xunit.runner.visualstudio" Version="3.0.2" />
+    <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.2" />
   </ItemGroup>
 </Project>