chore(deps): update dependency verify.xunit to 26.4.0 (#1813)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Refit.GeneratorTests/Refit.GeneratorTests.csproj

@@ -20,7 +20,7 @@
         <PackageReference Include="System.Collections.Immutable" Version="9.0.0-preview.7.24405.7" />
         <PackageReference Include="Verify.DiffPlex" Version="3.1.0" />
         <PackageReference Include="Verify.SourceGenerators" Version="2.4.0" />
-        <PackageReference Include="Verify.Xunit" Version="26.3.1" />
+        <PackageReference Include="Verify.Xunit" Version="26.4.0" />
         <PackageReference Include="System.Reactive" Version="6.0.1" />
         <PackageReference Include="Microsoft.AspNetCore.WebUtilities" Version="2.2.0" />
         <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.11.0" />