Fix windows custom margins key mistake

Sine Striker

2023-12-09 7aabc22e0b6841a46eb449398e4e8910352008cc

 src/core/corewindowagent_p.h

@@ -16,6 +16,8 @@

        CoreWindowAgent *q_ptr; // no need to initialize

        virtual AbstractWindowContext *createContext() const;

        bool setup(QObject *host, WindowItemDelegate *delegate);

        std::unique_ptr<AbstractWindowContext> context;