Fix label_catalogue configuration node deprecation message

[7ochem]

Subject

This PR fixes the faulty (copy-paste mistake) label_catalogue configuration node deprecation message. It confused me, because I searched my project for the use of default_label_catalogue but could not find anything. It seemed I have been using
label_catalogue in my project, which triggered the deprecation message.

Apparently the has been a small copy-paste mistake of

SonataAdminBundle/src/DependencyInjection/Configuration.php

Lines 327 to 335 in 939707c

	// NEXT_MAJOR: Remove this option.
	->scalarNode('default_label_catalogue')
	->setDeprecated(
	'sonata-project/admin-bundle',
	'4.9',
	'The "default_label_catalogue" node is deprecated, use "default_translation_domain" instead.'
	)
	->defaultValue('SonataAdminBundle')
	->info('Label Catalogue used for admin services if one isn\'t provided.')

I am targeting the 4.x branch, because it is a patch fix and it is backwards compatible.

Changelog

### Fixed
- `label_catalogue` configuration node deprecation message

[VincentLanglet]

Thanks