Fix for trimming excerpts in advanced-recent-posts-widget Wo

Fix for trimming excerpts in advanced-recent-posts-widget Wordpress plugin

old code:
<p><?php echo get_the_excerpt() . $linkmore; ?> </p>

new code:
<p><?php echo wp_trim_words(get_the_excerpt(), $instance['excerpt_length'],'') . $linkmore; ?> </p>