Fix typo (vuejs#1546)

JingYenLoh · sdras · commit 06b6202c2dbd · 2018-03-30T15:24:07.000-05:00
diff --git a/src/v2/guide/components-dynamic-async.md b/src/v2/guide/components-dynamic-async.md
@@ -255,7 +255,7 @@ new Vue({
 The async component factory can also return an object of the following format:
 
 ``` js
-const AsyncCompontent = () => ({
+const AsyncComponent = () => ({
   // The component to load (should be a Promise)
   component: import('./MyComponent.vue'),
   // A component to use while the async component is loading
