Docs: Add missing documentation for the `$wp_admin_bar` parameter in the DocBlock for the deprecated `wp_admin_bar_dashboard_view_site_menu()`.

See #32246.


git-svn-id: https://develop.svn.wordpress.org/trunk@36754 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/deprecated.php

@@ -2777,6 +2777,8 @@ function parent_post_rel_link( $title = '%title' ) {
  *
  * @since 3.2.0
  * @deprecated 3.3.0
+ *
+ * @param WP_Admin_Bar $wp_admin_bar WP_Admin_Bar instance.
  */
 function wp_admin_bar_dashboard_view_site_menu( $wp_admin_bar ) {
 	_deprecated_function( __FUNCTION__, '3.3' );