fix(deps): update dependency phpmailer/phpmailer to v6.12.0 (#263)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

composer.json

@@ -12,7 +12,7 @@
         "cebe/php-openapi": "1.8.0",
         "symfony/lock": "7.0.0",
         "vlucas/phpdotenv": "5.6.3",
-        "phpmailer/phpmailer": "6.10.0"
+        "phpmailer/phpmailer": "6.12.0"
     },
     "require-dev": {
         "ext-xml": "*",