fix(index): 完善网站内容

index.html

@@ -37,10 +37,10 @@
             <img src="./index/assets/img/badge.svg">
           </a>
           <p>
-            <a href="/start/#install" class="btn btn--light-outline btn--large">
+            <a href="./index/start.html#installing-rust" class="btn btn--light-outline btn--large">
               <img src="./index/assets/img/download.svg" class="index-prefix" /><!-- <i class="fas fa-download"></i> --> 下载安装
             </a>
-            <a href="/contact/#list" class="btn btn--light-outline btn--large">
+            <a href="./index/contact.html#list" class="btn btn--light-outline btn--large">
               <img src="./index/assets/img/envelope.svg" class="index-prefix" /><!-- <i class="fas fa-envelope"></i> --> 获取更新
             </a>
           </p>