[CI] Force local UX packages with "highest", because of the composer.lock

Author: Kocal

.github/reinstall-packages.php

@@ -75,8 +75,7 @@ jobs:
                 uses: ramsey/composer-install@v3
                 with:
                     working-directory: ux.symfony.com
-            -   name: Re-install root packages, to force local packages to be used
-                run: php ../.github/reinstall-packages.php
+                    dependency-versions: 'highest'
             -   name: Importmap dependencies
                 run: php bin/console importmap:install
             -   name: Build Sass assets