Themes: Add unlink-homepage-logo to the create_initial_theme_features() registration for the custom-logo theme feature.

Follow-up to [48039], [48283], [48749], [48757], [48758].

This brings the changes to the 5.5 branch.

Props TimothyBlynJacobs, SergeyBiryukov, whyisjake.
Fixes #37011.

Built from https://develop.svn.wordpress.org/branches/5.5@48759


git-svn-id: http://core.svn.wordpress.org/branches/5.5@48521 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/theme.php

@@ -3829,6 +3829,9 @@ function create_initial_theme_features() {
 								'type' => 'string',
 							),
 						),
+						'unlink-homepage-logo' => array(
+							'type' => 'boolean',
+						),
 					),
 				),
 			),

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.5-RC2-48756';
+$wp_version = '5.5-RC2-48759';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.