Block Editor: Update the packages with a number of fixes targeted for Beta 4.

It includes fixes from these two backport PRs: 

 - https://github.com/WordPress/gutenberg/pull/32992
 - https://github.com/WordPress/gutenberg/pull/32956

Props gziolo, ryelle, ntsekouras, desrosj, jorgefilipecosta.
See #53397


git-svn-id: https://develop.svn.wordpress.org/trunk@51241 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/rest-api/class-wp-rest-server.php

@@ -1228,6 +1228,7 @@ class WP_REST_Server {
 		$response = new WP_REST_Response( $available );
 		$response->add_link( 'help', 'https://developer.wordpress.org/rest-api/' );
 		$this->add_active_theme_link_to_index( $response );
+		$this->add_site_logo_to_index( $response );
 
 		/**
 		 * Filters the REST API root index data.
@@ -1272,6 +1273,29 @@ class WP_REST_Server {
 		}
 	}
 
+	/**
+	 * Exposes the site logo through the WordPress REST API.
+	 * This is used for fetching this information when user has no rights
+	 * to update settings.
+	 *
+	 * @since 5.8.0
+	 *
+	 * @param WP_REST_Response $response REST API response.
+	 */
+	protected function add_site_logo_to_index( WP_REST_Response $response ) {
+		$site_logo_id                = get_theme_mod( 'custom_logo' );
+		$response->data['site_logo'] = $site_logo_id;
+		if ( $site_logo_id ) {
+			$response->add_link(
+				'https://api.w.org/featuredmedia',
+				rest_url( 'wp/v2/media/' . $site_logo_id ),
+				array(
+					'embeddable' => true,
+				)
+			);
+		}
+	}
+
 	/**
 	 * Retrieves the index for a namespace.
 	 *