Update theme url (#6076)

* Update theme url

Fix the wrong theme Theme URI

* Update Theme URI

Removal of www from the Theme URI

antonia/style.css

@@ -1,6 +1,6 @@
 /*
 Theme Name: Antonia
-Theme URI: https://github.com/automattic/themes/tree/trunk/antonia
+Theme URI: https://wordpress.com/theme/antonia
 Author: Automattic
 Author URI: https://automattic.com
 Description: Antonia is a theme for selling products with the help of payments block.