Fix whitelist check to be case insensitive

Problem/Motivation

Need to implement patch from h5p vendor.

Standard patches does not works.

      "h5p/h5p-editor": {
        "Fix whitelist check to be case insensitive": "https://github.com/h5p/h5p-editor-php-library/commit/bd871a3181f3e4a343351ae6a22d773a74d928b7.diff",
        "Fix PHP 8 deprecation issue": "https://github.com/h5p/h5p-editor-php-library/commit/2edfd9b9e72d20e3b61f17a6836da21edb370624.diff"
      },

Remaining tasks

https://www.drupal.org/project/h5p/issues/3260094 🐛 PHP 8.0 deprecated syntax warnings for h5p-editor RTBC