minor #61373 chore: PHP CS Fixer - heredoc indentation as of PHP 7.3 (keradus)

This PR was merged into the 7.4 branch.

Discussion
----------

 chore: PHP CS Fixer - heredoc indentation as of PHP 7.3

| Q             | A
| ------------- | ---
| Branch?       | 7.4
| Bug fix?      | no
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Issues        | Fix CS <!-- prefix each issue number with "Fix #", no need to create an issue if none exists, explain below instead -->
| License       | MIT

inspired by symfony/symfony@06e22b0#r2265021821

[Possible since PHP 7.3](https://www.php.net/manual/en/language.types.string.php#language.types.string.syntax.heredoc)

with love by [PHP Coding Standards Fixer](https://cs.symfony.com/)

Commits
-------

4a25a6a5785 chore: heredoc indentation as of PHP 7.3

Author: nicolas-grekas

Resources/WcswidthDataGenerator.php

@@ -80,24 +80,24 @@ private function getHeader(string $version): string
         $date = (new \DateTimeImmutable())->format('c');
 
         return <<<EOT
-<?php
-
-/*
- * This file is part of the Symfony package.
- *
- * (c) Fabien Potencier <fabien@symfony.com>
- *
- * This file has been auto-generated by the Symfony String Component for internal use.
- *
- * Unicode version: $version
- * Date: $date
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-
-EOT;
+            <?php
+
+            /*
+             * This file is part of the Symfony package.
+             *
+             * (c) Fabien Potencier <fabien@symfony.com>
+             *
+             * This file has been auto-generated by the Symfony String Component for internal use.
+             *
+             * Unicode version: $version
+             * Date: $date
+             *
+             * For the full copyright and license information, please view the LICENSE
+             * file that was distributed with this source code.
+             */
+
+
+            EOT;
     }
 
     private function format(array $rawData): array