Missing docs about how to initiate the component via manual script loading

[Schiocco]

Hi

On you docs you show that you just need to load the JS script

<sript src="https://cdn.jsdelivr.net/npm/@editorjs/header@latest"></sript>
Then in Editor JS enter

 tools: {
            header: Header,
 }

The problem is that for obvious reasons this error happen: Uncaught ReferenceError: Header is not defined