docs: fix wrong link

Author: PanJiaChen

src/views/components-demo/tinymce.vue

@@ -2,7 +2,7 @@
   <div class="components-container">
     <aside>
       {{ $t('components.tinymceTips') }}
-      <a target="_blank" class="link-type" href="https://panjiachen.github.io/vue-element-admin-site/component/rich-editor.html"> {{ $t('components.documentation') }}</a>
+      <a target="_blank" class="link-type" href="https://panjiachen.github.io/vue-element-admin-site/feature/component/rich-editor.html"> {{ $t('components.documentation') }}</a>
     </aside>
     <div>
       <tinymce v-model="content" :height="300" />