docs(ngRepeat): fix typo

Replace "ian" in "in"

Closes #5027

src/ng/directive/ngRepeat.js

@@ -99,7 +99,7 @@
  *     For example: `item in items track by $id(item)`. A built in `$id()` function can be used to assign a unique
  *     `$$hashKey` property to each item in the array. This property is then used as a key to associated DOM elements
  *     with the corresponding item in the array by identity. Moving the same object in array would move the DOM
- *     element in the same way ian the DOM.
+ *     element in the same way in the DOM.
  *
  *     For example: `item in items track by item.id` is a typical pattern when the items come from the database. In this
  *     case the object identity does not matter. Two objects are considered equivalent as long as their `id`