Release 1.9.4

Fixed:
- Fresh installations failing on Drupal core 11.4: the new symfony/runtime
  Composer plugin was blocked by the allow-plugins configuration, aborting
  composer install on every new clone
- Fresh installations aborting on an obsolete noreqnewpass patch: 1.6.x
  includes the fix upstream, so the patch is removed and the module now
  requires ^1.6
- Drupal core pinned to 11.3.x: the distribution does not yet install
  correctly on core 11.4 (reaction fields skipped during recipe apply);
  11.4 compatibility will follow in a separate release
- Install command URL in README updated to install.open-intranet.com