Docs: MorphTo, singularLabel and dependency container

[preliot]

Suggestion for improvement of documentation for MorphTo field:

If you want to depend on morphTo and use singularLabel() on your Nova resources, the dependency won't work if you follow documentation. The solution is you must depend on the singular label (and not the Model/Class name).

Example:

MorphTo::make('Commentable')->types([
    Post::class,
    Video::class,
]),

NovaDependencyContainer::make([
    Text::make('Additional Text', 'additional'),
    Boolean::make('Visible', 'visible')
])
->dependsOn('commentable', Post::singularLabel())