PHPMailer 6.9.3

This is a maintenance release, adding support for the release version of PHP 8.4, and experimental support for PHP 8.5.

What's Changed

• Update PHPMailerTest.php reference by @emmanuel-ferdman in #3114
• GH Actions: PHP 8.4 has been released by @jrfnl in #3115

New Contributors

• @emmanuel-ferdman made their first contribution in #3114

Full Changelog: v6.9.2...v6.9.3