Bump build/php from b1eaaa4 to 9728fa5

Bumps [build/php](https://github.com/pmmp/php-build-scripts) from `b1eaaa4` to `9728fa5`.
- [Release notes](https://github.com/pmmp/php-build-scripts/releases)
- [Commits](pmmp/PHP-Binaries@b1eaaa4...9728fa5)

---
updated-dependencies:
- dependency-name: build/php
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>