fix(Dropdown): fix menuRenderer type

Author: rivka-ungar

packages/core/src/components/Dropdown/Dropdown.types.ts

@@ -150,7 +150,7 @@ export interface DropdownComponentProps extends CustomMenuBaseProps, CustomOptio
   /**
    * custom menu render function
    */
-  menuRenderer?: React.ReactElement;
+  menuRenderer?: React.ReactElement | ((props: CustomMenuProps) => React.ReactElement);
   /**
    * Default placement of the Dropdown menu in relation to its control. Use "auto" to flip the menu when there isn't enough space below the control.
    */