Update php/class-coauthors-plus.php

Co-authored-by: Gary Jones <[email protected]>

php/class-coauthors-plus.php

@@ -1831,7 +1831,7 @@ public function filter_pre_get_avatar_data_url( $args, $id ) {
 			return $args;
 		}
 
-		// Do not filter the avatar if this is doing a heartbeat request on WP refresh lock
+		// Do not filter the avatar if this is doing a heartbeat request on WP refresh lock.
 		if ( wp_doing_ajax() && isset( $_POST['action'] ) &&  'heartbeat' === $_POST['action'] ) {
 			return $args;
 		}