Bump PHP Modules and Release: php-buildpack (09-26)

[cf-buildpacks-eng]

Release reminder for php-buildpack

The ideal release date window for this buildpack starts on: 09-26 and ends on 10-01.

• 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)