improvements following review

src/Bundle/ChillTaskBundle/migrations/Version20210909153533.php

@@ -7,14 +7,11 @@ namespace Chill\Migrations\Task;
 use Doctrine\DBAL\Schema\Schema;
 use Doctrine\Migrations\AbstractMigration;
 
-/**
- * Auto-generated Migration: Please modify to your needs!
- */
 final class Version20210909153533 extends AbstractMigration
 {
     public function getDescription(): string
     {
-        return '';
+        return 'An accompanying period can be linked to a task. Key course_id is added to single task entity';
     }
 
     public function up(Schema $schema): void