Issue #3485598: Fix method definition to be compatible with AI module beta version.

Closes #3485598

src/Plugin/AiCKEditor/SummarizeDocument.php

@@ -120,7 +120,7 @@ final class SummarizeDocument extends AiCKEditorPluginBase {
   /**
    * {@inheritdoc}
    */
-  public function buildCkEditorModalForm(array $form, FormStateInterface $form_state) {
+  public function buildCkEditorModalForm(array $form, FormStateInterface $form_state, array $settings = []) {
     $storage = $form_state->getStorage();
     $editor_id = $this->requestStack->getParentRequest()->get('editor_id');