MDL-35422 Fix the confusing submit button label

mod/workshop/lang/en/workshop.php

@@ -83,7 +83,7 @@
 $string['configgradinggrade'] = 'Default maximum grade for assessment in workshops';
 $string['configmaxbytes'] = 'Default maximum submission file size for all workshops on the site (subject to course limits and other local settings)';
 $string['configstrategy'] = 'Default grading strategy for workshops';
-$string['createsubmission'] = 'Submit';
+$string['createsubmission'] = 'Start preparing your submission';
 $string['daysago'] = '{$a} days ago';
 $string['daysleft'] = '{$a} days left';
 $string['daystoday'] = 'today';