docs: fix indent (#1575)

nyeong · ulivz · commit 974b15461e51 · 2019-05-01T13:13:06.000+08:00
Indent closing tag `&lt;/div&gt;` at line 429.
diff --git a/packages/docs/docs/plugin/option-api.md b/packages/docs/docs/plugin/option-api.md
@@ -426,7 +426,7 @@ Then, VuePress will automatically inject these components behind the layout comp
   <div class="global-ui">
     <Component-1/>
     <Component-2/>
-</div>
+  </div>
 </div>
 ```
 
