lang/php85: Update version 8.5.0RC3=>8.5.0RC4

Please DO NOT use this version in production, it is an early test
version.

Changelog: https://github.com/php/php-src/blob/php-8.5.0RC4/NEWS
(cherry picked from commit ccd77ed15607e5e5d760baf0141415e2921501fc)