Improve automatic mocking (#7676)

Author: tobias-tengler

src/HotChocolate/Fusion/test/Core.Tests/AutomaticMockingTests.cs

@@ -3094,7 +3094,7 @@ type Query {
 
         using var subgraphs = new TestSubgraphCollection(output, [subgraph]);
         var executor = await subgraphs.GetExecutorAsync(
-            configureBuilder: builder =>
+            configure: builder =>
                 builder.AddErrorFilter(error => error.WithMessage("REPLACED MESSAGE").WithCode("CUSTOM_CODE")));
         var request = """
                       query {