build(deps): bump php from 8.4.0alpha2-fpm to 8.4.0beta3-fpm in /php

Bumps php from 8.4.0alpha2-fpm to 8.4.0beta3-fpm.

---
updated-dependencies:
- dependency-name: php
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

php/Dockerfile

@@ -1,4 +1,4 @@
-FROM php:8.4.0alpha2-fpm
+FROM php:8.4.0beta3-fpm
 
 ENV IPE_GD_WITHOUTAVIF=1