Bump PHP Modules and Release: php-buildpack (07-11)

[cf-buildpacks-eng]

Release reminder for php-buildpack

The ideal release date window for this buildpack starts on: 07-11 and ends on 07-16.

• 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)

[arjun024]

https://github.com/cloudfoundry/php-buildpack/releases/tag/v4.6.22