Fix demo file paths

[Qard]

Fixes #45

[jlucaso1]

@Qard Im getting an different error:

➜  demo git:(fix-demo-file-paths) ✗ PHP_NODE_TEST=true node server.js
node:internal/process/promises:394
    triggerUncaughtException(err, true /* fromPromise */);
    ^

AssertionError [ERR_ASSERTION]: Expected values to be strictly equal:
actual expected

'Hello, from PHP!'

    at Server.<anonymous> (file:///home/jlucaso/projects/php-node/demo/server.js:68:3)
    at process.processTicksAndRejections (node:internal/process/task_queues:105:5) {
  generatedMessage: true,
  code: 'ERR_ASSERTION',
  actual: '',
  expected: 'Hello, from PHP!',
  operator: 'strictEqual'
}

Node.js v24.2.0

Can be an linux only related issue?
Im on arch linux x64 (php.linux-x64-gnu.node)

[mcollina]

lgtm