Fix CI breaking on next minor for AI CKEditor

Check: https://git.drupalcode.org/project/ai/-/jobs/9055528

Install Ai CKEditor (Drupal\Tests\ai_ckeditor\Kernel\InstallAiCKEditor)
     ⚠ Module can be enabled
    
    1 test triggered 2 PHP warnings:
    
    1) /builds/project/ai/web/core/modules/ckeditor5/src/Hook/Ckeditor5Hooks.php:406
    Undefined array key "filter.format.*"
    
    Triggered by:
    
    * Drupal\Tests\ai_ckeditor\Kernel\InstallAiCKEditorTest::testModuleCanBeEnabled
      /builds/project/ai/modules/ai_ckeditor/tests/src/Kernel/InstallAiCKEditorTest.php:24
    
    2) /builds/project/ai/web/core/modules/ckeditor5/src/Hook/Ckeditor5Hooks.php:406
    Trying to access array offset on null
    
    Triggered by:
    
    * Drupal\Tests\ai_ckeditor\Kernel\InstallAiCKEditorTest::testModuleCanBeEnabled (2 times)
      /builds/project/ai/modules/ai_ckeditor/tests/src/Kernel/InstallAiCKEditorTest.php:24