docs(ngOptions): correct links

remove redundant link to ngOptions and add link to ngRepeat

Author: austinoneil

src/ng/directive/ngOptions.js

@@ -17,8 +17,9 @@ var ngOptionsMinErr = minErr('ngOptions');
  * elements for the `<select>` element using the array or object obtained by evaluating the
  * `ngOptions` comprehension expression.
  *
- * In many cases, `ngRepeat` can be used on `<option>` elements instead of `ngOptions` to achieve a
- * similar result. However, `ngOptions` provides some benefits such as reducing memory and
+ * In many cases, {@link ng.directive:ngRepeat ngRepeat} can be used on `<option>` elements
+ * instead of `ngOptions` to achieve a similar result.
+ * However, `ngOptions` provides some benefits such as reducing memory and
  * increasing speed by not creating a new scope for each repeated instance, as well as providing
  * more flexibility in how the `<select>`'s model is assigned via the `select` **`as`** part of the
  * comprehension expression. `ngOptions` should be used when the `<select>` model needs to be bound