Compatibility Issue with Ember.js 5.x - `htmlSafe` Not Implemented in `@ember/string`

[wozny1989]

Hi, I've encountered an issue when using the ember-burger-menu package with Ember.js 5.x. Upon trying to run the application, the following error appears in the browser console:

Uncaught (in promise) Error: htmlSafe is not implemented in the `@ember/string` package. Please import from `@ember/template` instead.

It seems like htmlSafe is being imported from @ember/string, which is no longer supported in Ember.js 5.x. The correct import should be from @ember/template.