Update php

Changes:

- docker-library/php@a0644559: Merge pull request docker-library/php#1552 from jnoordsij/alpine3.21
- docker-library/php@45cfafc3: Add patches for Alpine/8.1 builds
- docker-library/php@aa678aea: Add Alpine 3.21 and drop 3.19

Author: docker-library-bot