Fix #135581: node tree incorrect evaluation

Instances attributes are propagated by default by `Curve Fill`, but this
is not mentioned in a declaration.

Pull Request: https://projects.blender.org/blender/blender/pulls/135597

source/blender/nodes/geometry/nodes/node_geo_curve_fill.cc

@@ -34,7 +34,7 @@ static void node_declare(NodeDeclarationBuilder &b)
       .hide_value()
       .description(
           "An index used to group curves together. Filling is done separately for each group");
-  b.add_output<decl::Geometry>("Mesh");
+  b.add_output<decl::Geometry>("Mesh").propagate_all();
 }
 
 static void node_layout(uiLayout *layout, bContext * /*C*/, PointerRNA *ptr)