Removed ofType depth

Author: michaelstaib

src/HotChocolate/Core/src/Validation/Rules/IntrospectionDepthVisitor.cs

@@ -18,7 +18,7 @@ private readonly (FieldCoordinate Coordinate, ushort MaxAllowed)[] _limits =
         (new FieldCoordinate("__Type", "inputFields"), 1),
         (new FieldCoordinate("__Type", "interfaces"), 1),
         (new FieldCoordinate("__Type", "possibleTypes"), 1),
-        (new FieldCoordinate("__Type", "ofType"), 8),
+        (new FieldCoordinate("__Type", "ofType"), 16),
     ];
 
     protected override ISyntaxVisitorAction Enter(