Docs: Remove a trailing period from a URL in a @see tag.

This ensures that the ticket link works as expected.

Follow-up to [55005].

Props mukesh27.
Fixes #60171.

git-svn-id: https://develop.svn.wordpress.org/trunk@57236 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/nav-menu-template.php

@@ -646,7 +646,7 @@ function _nav_menu_item_id_use_once( $id, $item ) {
  * WordPress 3.0.0 so this needs to allow for cases in which the filter is
  * called without them.
  *
- * @see https://core.trac.wordpress.org/ticket/56926.
+ * @see https://core.trac.wordpress.org/ticket/56926
  *
  * @since 6.2.0
  *