By using `get_template_directory()` instead of `get_stylesheet_directory()`, we make sure to include the `block-patterns.php` file from the parent theme. This avoids a PHP fatal error when using a child theme of Twenty Ten. Follow-up to [51106]. Props ryelle, sabernhardt, loranrendel. Fixes #53752. Built from https://develop.svn.wordpress.org/trunk@51482 git-svn-id: http://core.svn.wordpress.org/trunk@51093 1a063a9b-81f0-0310-95a4-ce76da25c4cd