fix: fix defaults not updated in `generate_initializesystem`#3667

AayushSabharwal wants to merge 1 commit intoSciML:masterSciML/ModelingToolkit.jl:masterfrom

AayushSabharwal:as/initsys-fixAayushSabharwal/ModelingToolkit.jl:as/initsys-fixCopy head branch name to clipboard