chore(deps): update dependency xunit to 2.9.2

Author: renovate[bot]

src/directory.packages.props

@@ -30,7 +30,7 @@
     <PackageVersion Include="Microsoft.Reactive.Testing" Version="6.0.1" />
   </ItemGroup>
   <ItemGroup>
-    <PackageVersion Include="xunit" Version="2.9.1" />
+    <PackageVersion Include="xunit" Version="2.9.2" />
     <PackageVersion Include="xunit.analyzers" Version="1.16.0" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="2.8.2" />
   </ItemGroup>