[SDPAP-8359] increase character limit for urlfield

### Jira
[SDPAP-8359] Embed tool - increase character limit for URL field

### Change
simply increase #maxlength to 512, which should be enough.

modules/tide_ckeditor/src/Plugin/EmbeddedContent/TideIframe.php

@@ -59,6 +59,7 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
       '#type' => 'url',
       '#title' => $this->t('Url'),
       '#default_value' => $this->configuration['url'],
+      '#maxlength' => 512,
       '#required' => TRUE,
     ];
     $form['width'] = [