Bump PHP Modules and Release: php-buildpack (04-25)

[cf-buildpacks-eng]

Release reminder for php-buildpack

The ideal release date window for this buildpack starts on: 04-25 and ends on 04-30.

• Bump PHP modules. See doc
• See diff from latest version and validate if a release is required.
• Make sure the latest commit on has passed tests on the CI
• Refer release instructions. (private link)

[sophiewigmore]

#1048