How to remove/replace the inscription on the search button in the Wordpress template?

my_search_form function( $form ) {

 $form = '
 <form role="search" method="get" id="searchform" action="' . home_url( '/' ) . '">
 <label class="screen-reader-text" for="s">search:</label>
 <input type="text" value="' . get_search_query() . '" name="s" id="s">
 <input type="submit" id="searchsubmit" value="Find">
</form>';

 return $form;
}

add_filter( 'get_search_form', 'my_search_form' );