fix(ci): Fixed timeout in the integration test

[lslezak]

Problem

• The integration test sometimes fails
• https://github.com/agama-project/agama/actions/runs/12390466733/job/34585536259

1) Agama test
       should require setting the root password:
     Error: Timeout of 20000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves. (/usr/share/agama/integration-tests/tests/test_root_password.js)
      at listOnTimeout (node:internal/timers:594:[17](https://github.com/agama-project/agama/actions/runs/12390466733/job/34585536259#step:17:18))
      at process.processTimers (node:internal/timers:529:7)

The uploaded screenshot confirms that the software initialization was still running:

Solution

• Fix the timeout setting