wpmu_new_blog deprecated

[ajaydsouza]

https://github.com/WebberZone/contextual-related-posts/blob/cb347764b8f83b8b56e40fd8fcb83562cdbaca52/includes/plugin-activator.php#L126

Use wp_initialize_site instead.

if ( version_compare( get_bloginfo( 'version' ), '5.1', '>=' ) ) {
    add_action( 'wp_initialize_site', 'crp_activate_new_site' );
} else {
    add_action( 'wpmu_new_blog', 'crp_activate_new_site' );
}