Emails change admin notices

[afercia]

Trac ticket: https://core.trac.wordpress.org/ticket/66173#comment:4

Use of AI Tools

None

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This Pull Request is for code review only. Please keep all other discussion in the Trac ticket. Do not merge this Pull Request. See GitHub Pull Requests for Code Review in the Core Handbook for more details.

[github-actions]

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Core Committers: Use this line as a base for the props when committing in SVN:

Props afercia.

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[github-actions]

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[afercia]

Reminder for myself: check this two hooks for multisite:

wordpress-develop/src/wp-admin/includes/ms-admin-filters.php

Lines 14 to 15 in c23817e

	add_action( 'user_admin_notices', 'new_user_email_admin_notice' );
	add_action( 'network_admin_notices', 'new_user_email_admin_notice' );