chore(deps): update dependency xunit.stafact to v3

Author: renovate[bot]

test/MvvmDialogs.Test.csproj

@@ -40,6 +40,6 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
-    <PackageReference Include="Xunit.StaFact" Version="1.2.69" />
+    <PackageReference Include="Xunit.StaFact" Version="3.0.13" />
   </ItemGroup>
 </Project>