Disable autofill in mail field

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Hi. I’ve added this code in functions, but seems not working. where am i wrong? thx

add_filter( 'gform_field_content', function ( $field_content, $field ) {
    if ( $field->type == 'email' ) {
        return str_replace( 'type=', "autocomplete='off' type=", $field_content );
    }
  
    return $field_content;
}, 10, 2 );