refactor: 调整示例，兼容 UniPage

uni_modules/uni-stat/utssdk/common/utils/pageInfo.uts

@@ -233,7 +233,7 @@ export const get_page_name = (routepath : string) : string => {
   }
 
     // @ts-ignore
-  const pageStyle = page.$page.getPageStyle()
+  const pageStyle = (page.$page as UniPage).getPageStyle()
   const titleText = pageStyle['navigationBarTitleText'] ?? ''
   return titleText as string
 }