test-built-npm-packages is failing for PHP 7.2

[brandonpayton]

A test-built-npm-packages test is failing for PHP 7.2 since the OP Cache PR merge:
https://github.com/WordPress/wordpress-playground/actions/runs/16452326017/job/46500589285#step:9:228

A strange thing is that this failure didn't show up in the last OP Cache PR commit prior to merge:
1246c40

I wonder if it is a timing issue and plan to adjust timeouts to try that.