修改图片轮播

src/pages/index/index.html

             <div class="swiper-slide">
               <img
                 class="lazy"
-                data-src="./static/images/index/banner4.jpg"
-                data-srcM="./static/images/index/banner4m.jpg"
+                data-src="./static/images/index/banner3.jpg"
+                data-srcM="./static/images/index/banner3m.jpg"
                 alt=""
               />
               <div class="slideCon">