chore: typo in comment

Author: 7006

src/platforms/web/compiler/modules/model.js

@@ -1,7 +1,7 @@
 /* @flow */
 
 /**
- * Expand input[v-model] with dyanmic type bindings into v-if-else chains
+ * Expand input[v-model] with dynamic type bindings into v-if-else chains
  * Turn this:
  *   <input v-model="data[type]" :type="type">
  * into this: