Pull Request: https://github.com/php/web-php/pull/1120 Author: cmb69
v3 is meant for nodejs 16, but that is no longer supported by hosted GH runners[1]. To avoid potential instabilities, we update to v4. [1] <https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/>
