Add PM5 PHP 8.4 URL to README

Author: dktapps

README.md

@@ -6,6 +6,7 @@
 - [PM5 default](https://github.com/pmmp/PHP-Binaries/releases/tag/pm5-latest)
 - [PM5 PHP 8.2](https://github.com/pmmp/PHP-Binaries/releases/tag/pm5-php-8.2-latest) (default for PM 5.10+)
 - [PM5 PHP 8.3](https://github.com/pmmp/PHP-Binaries/releases/tag/pm5-php-8.3-latest) (not officially supported, but works in PM 5.9+)
+- [PM5 PHP 8.4](https://github.com/pmmp/PHP-Binaries/releases/tag/pm5-php-8.4-latest) (not officially supported, but works in PM 5.33+)
 
 ### Legacy binaries, no longer updated
 - [PM4 PHP 8.0](https://github.com/pmmp/PHP-Binaries/releases/tag/pm4-php-8.0-latest) (default for PM 4.0+)