lang/php85: Update version 8.5.0RC4=>8.5.0RC5

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

Changelog: https://github.com/php/php-src/blob/php-8.5.0RC5/NEWS
(cherry picked from commit c878a020eda96f9c1d0f2f32e8ba86284ceadd79)