Update dependency xunit to 2.9.3

Author: renovate[bot]

Directory.Packages.props

@@ -11,7 +11,7 @@
   <ItemGroup Label="Library.Template">
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="2.8.2" />
-    <PackageVersion Include="xunit" Version="2.9.2" />
+    <PackageVersion Include="xunit" Version="2.9.3" />
   </ItemGroup>
   <ItemGroup>
     <!-- Put repo-specific GlobalPackageReference items in this group. -->