Appleton: Update the theme tags (#6050)

* Appleton: Add auto-loading-homepage tag to style.css

* Appleton: Update theme URI

appleton/style.css

@@ -1,6 +1,6 @@
 /*
 Theme Name: Appleton
-Theme URI: https://github.com/automattic/themes/tree/trunk/appleton
+Theme URI: https://wordpress.com/theme/appleton
 Author: Automattic
 Author URI: https://automattic.com
 Description: Appleton is a theme for creative professionals, such as photographers, designers and artists.
@@ -12,5 +12,5 @@ License: GNU General Public License v2 or later
 License URI: https://raw.githubusercontent.com/Automattic/themes/trunk/LICENSE
 Template: blockbase
 Text Domain: appleton
-Tags: one-column, custom-colors, custom-menu, custom-logo, editor-style, featured-images, full-site-editing, rtl-language-support, theme-options, threaded-comments, translation-ready, wide-blocks
+Tags: one-column, custom-colors, custom-menu, custom-logo, editor-style, featured-images, full-site-editing, rtl-language-support, theme-options, threaded-comments, translation-ready, wide-blocks, auto-loading-homepage
 */