修改demo

Signed-off-by: Nluoweibin <luoweibin3@huawei.com>
Change-Id: Ia9b56edbc0d30d3062d832adfae1f7b491078963

zh-cn/application-dev/reference/arkui-ts/ts-container-sidebarcontainer.md

@@ -143,6 +143,7 @@ struct SideBarContainerExample {
     .sideBarWidth(150)
     .minSideBarWidth(50)
     .maxSideBarWidth(300)
+    .minContentWidth(0)
     .onChange((value: boolean) => {
       console.info('status:' + value)
     })