Applied rector suggestions

src/Entity/LabelSystem/LabelProcessMode.php

@@ -1,4 +1,7 @@
 <?php
+
+declare(strict_types=1);
+
 /*
  * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
  *
@@ -17,7 +20,6 @@
  *  You should have received a copy of the GNU Affero General Public License
  *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
-
 namespace App\Entity\LabelSystem;
 
 enum LabelProcessMode: string
@@ -26,4 +28,4 @@ enum LabelProcessMode: string
     case PLACEHOLDER = 'html';
     /** Interpret the given lines as twig template */
     case TWIG = 'twig';
-}
+}