docs：optimization point notes (#2526)

src/hooks/event/useBreakpoint.ts

@@ -2,6 +2,10 @@ import { ref, computed, ComputedRef, unref } from 'vue';
 import { useEventListener } from '/@/hooks/event/useEventListener';
 import { screenMap, sizeEnum, screenEnum } from '/@/enums/breakpointEnum';
 
+// 可以用这个替换，优化项
+// import { Grid } from 'ant-design-vue';
+// const { useBreakpoint } = Grid;
+
 let globalScreenRef: ComputedRef<sizeEnum | undefined>;
 let globalWidthRef: ComputedRef<number>;
 let globalRealWidthRef: ComputedRef<number>;