Datepicker i18n: Corrected Dutch abbreviation of month name March. Fixed #7566 - Dutch march name translation

(cherry picked from commit 5002bf6)

Author: rdworth

ui/i18n/jquery.ui.datepicker-nl.js

@@ -8,7 +8,7 @@ jQuery(function($){
 		currentText: 'Vandaag',
 		monthNames: ['januari', 'februari', 'maart', 'april', 'mei', 'juni',
 		'juli', 'augustus', 'september', 'oktober', 'november', 'december'],
-		monthNamesShort: ['jan', 'feb', 'maa', 'apr', 'mei', 'jun',
+		monthNamesShort: ['jan', 'feb', 'mrt', 'apr', 'mei', 'jun',
 		'jul', 'aug', 'sep', 'okt', 'nov', 'dec'],
 		dayNames: ['zondag', 'maandag', 'dinsdag', 'woensdag', 'donderdag', 'vrijdag', 'zaterdag'],
 		dayNamesShort: ['zon', 'maa', 'din', 'woe', 'don', 'vri', 'zat'],