Editor: Include Cover block in the list of block types registered using metadata files.

This ensures that block stylesheets are rendered properly when `should_load_separate_core_block_assets` filter is turned on.

Follow-up to [50824], [50836].

Props walbo.
Fixes #53440.
Built from https://develop.svn.wordpress.org/trunk@51176


git-svn-id: http://core.svn.wordpress.org/trunk@50785 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/blocks/index.php

@@ -52,6 +52,7 @@ function register_core_block_types_from_metadata() {
 		'code',
 		'column',
 		'columns',
+		'cover',
 		'embed',
 		'freeform',
 		'gallery',

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.8-beta2-51175';
+$wp_version = '5.8-beta2-51176';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.