refactor: after review

Author: PKulkoRaccoonGang

src/containers/UnenrollConfirmModal/components/messages.js

@@ -25,7 +25,7 @@ const messages = defineMessages({
   reasonHeading: {
     id: 'learner-dash.unenrollConfirm.confirm.reason.heading',
     description: 'Heading for unenroll reason modal',
-    defaultMessage: 'What\'s your main reason for unenrolling?',
+    defaultMessage: 'Why are you unenrolling?',
   },
   reasonSkip: {
     id: 'learner-dash.unenrollConfirm.confirm.reason.skip',