refactor: update migration alert text

Author: navinkarkera

src/legacy-libraries-migration/messages.ts

@@ -65,16 +65,18 @@ const messages = defineMessages({
     id: 'legacy-libraries-migration.select-destination.alert.text',
     defaultMessage: 'All content from the'
       + ' {count, plural, one {{count} legacy library} other {{count} legacy libraries}} you selected will'
-      + ' be migrated to this new library, organized into collections. Any legacy libraries that are used in'
-      + ' problem banks will maintain their link with migrated content the first time they are migrated.',
+      + ' be migrated to this new library, organized into collections. Legacy library content used in courses will'
+      + ' continue to work as-is. To receive any future changes to migrated content, you must update these'
+      + ' references within your course.',
     description: 'Alert text in the select destination step of the legacy libraries migration page.',
   },
   confirmationViewAlert: {
     id: 'legacy-libraries-migration.select-destination.alert.text',
-    defaultMessage: 'These {count, plural, one {{count} legacy library} other {{count} legacy libraries}}'
-      + ' will be migrated to <b>{libraryName}</b> and organized as collections. Legacy library content used'
-      + ' in courses will continue to work as-is. To receive any future changes to migrated content,'
-      + ' you must update these references within your course.',
+    defaultMessage: 'All content from the'
+      + ' {count, plural, one {{count} legacy library} other {{count} legacy libraries}} you selected will'
+      + ' be migrated to <b>{libraryName}</b>, organized into collections. Legacy library content used in courses will'
+      + ' continue to work as-is. To receive any future changes to migrated content, you must update these'
+      + ' references within your course.',
     description: 'Alert text in the confirmation step of the legacy libraries migration page.',
   },
   previouslyMigratedAlert: {