Fix "API Functions" link

includes/classes/Feature/RelatedPosts/RelatedPosts.php

@@ -356,7 +356,7 @@ public function register_widget() {
 	 */
 	public function output_feature_box_long() {
 		?>
-		<p><?php echo wp_kses_post( __( 'Output related content using our Widget or directly in your theme using our <a href="https://github.com/10up/ElasticPress/#related-posts">API functions.</a>', 'elasticpress' ) ); ?></p>
+		<p><?php echo wp_kses_post( __( 'Output related content using our Widget or directly in your theme using our <a href="https://10up.github.io/ElasticPress/tutorial-features.html#related-posts">API functions.</a>', 'elasticpress' ) ); ?></p>
 		<?php
 	}
 }