Fixing word 'compatibility'

core/modules/block/src/BlockForm.php

@@ -281,7 +281,7 @@ protected function buildVisibilityInterface(array $form, FormStateInterface $for
     }
     if (isset($form['request_path'])) {
       // All those if statements are necessary because the negate field is unset
-      // so we need to ensure compatiblity with the request_path instances that
+      // so we need to ensure compatibility with the request_path instances that
       // do not have the page_options config set yet.
       if ($page_options_default_value) {
         $default_value = $page_options_default_value;