chore(deps-dev): bump heroku/heroku-buildpack-php from 255 to 256 in /buildpacks/buildpack-php/tests/php

[dependabot[bot]]

Bumps heroku/heroku-buildpack-php from 255 to 256.

Changelog

Sourced from heroku/heroku-buildpack-php's changelog.

[v256] - 2024-08-30

ADD

• PHP/8.2.23 [David Zuelke]
• PHP/8.3.11 [David Zuelke]
• ext-blackfire/1.92.22 [David Zuelke]
• ext-newrelic/11.1.0.14 [David Zuelke]

CHG

• Blackfire/2.28.11 [David Zuelke]
• Nginx/1.26.2 [David Zuelke]
• Composer/2.7.8 [David Zuelke]

Commits

• 6788b8c Prepare release v256 (#753)
• e59bf5b Merge pull request #752 from heroku/2024-08-updates2
• 226405f Composer/2.7.8
• 435c013 Nginx/1.26.2
• de906be Blackfire/2.28.11
• d924428 ext-newrelic/11.1.0.14
• 23c5f42 ext-blackfire/1.92.22
• 402561d PHP/8.3.11
• bfcb8e1 PHP/8.2.23
• 0572f12 Link to exts in generated Dev Center Changelog (#751)
• See full diff in compare view

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