Update dependency xunit to 2.9.2

Author: renovate[bot]

src/Cake.Terraform.Tests/Cake.Terraform.Tests.csproj

@@ -23,7 +23,7 @@
       to work around https://github.com/microsoft/vstest/issues/2469
     -->
     <PackageReference Include="Microsoft.TestPlatform.ObjectModel" Version="17.10.0" />
-    <PackageReference Include="xunit" Version="2.9.0" />
+    <PackageReference Include="xunit" Version="2.9.2" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2" />
   </ItemGroup>