Issue #2165855 by Kartagis: Typo plural vs. singular in migrate module description.

core/modules/migrate_drupal/migrate_drupal.info.yml

 name: Migrate Drupal
 type: module
-description: 'Contains migrations from olders Drupal versions.'
+description: 'Contains migrations from older Drupal versions.'
 package: Core
 version: VERSION
 core: 8.x