Specification change / Support for WordPress 5.8 widget block editor

【Contents of the fix】
■Pre-set headings in the custom post type “Recipe” editing screen can now be changed from the TCD theme options.
■Support for the WordPress 5.8 widget block editor

【Modified files】
admin/inc/recipe.php
functions/recipe_cf.php
languages/ja.mo
languages/ja.po
functions.php
style.css