add automatic date to the title

Hello very good morning

In my web I am using automatic dynamic years for the title with this function:

add_shortcode( 'anual' , 'fecha_actual' );
 function fecha_actual() {
 $year = date("Y");
 return "$year";
}
add_filter( 'the_title', 'do_shortcode' );

when the titles are displayed in the plugging part of the shortcode is shown: [anual]

How can I modify it?

thank you very much

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