Update GridColumn.js

add missing quote

Author: hahn-kev

src/js/core/factories/GridColumn.js

@@ -76,7 +76,7 @@ angular.module('ui.grid')
  * @propertyOf ui.grid.class:GridColumn
  * @description Filter on this column.
  * @example
- * <pre>{ term: 'text', condition: uiGridConstants.filter.STARTS_WITH, placeholder: 'type to filter...', ariaLabel: 'Filter for text, flags: { caseSensitive: false }, type: uiGridConstants.filter.SELECT, [ { value: 1, label: 'male' }, { value: 2, label: 'female' } ] }</pre>
+ * <pre>{ term: 'text', condition: uiGridConstants.filter.STARTS_WITH, placeholder: 'type to filter...', ariaLabel: 'Filter for text', flags: { caseSensitive: false }, type: uiGridConstants.filter.SELECT, [ { value: 1, label: 'male' }, { value: 2, label: 'female' } ] }</pre>
  *
  */