Editor: Fix version in WP_Theme_JSON_Resolver::get_block_data().

Introduced during the WP 6.1 alpha cycle, this commit fixes the version number from `1` to `2`.

Follow-up to [54162].

Props oandregal.
See #56467.

git-svn-id: https://develop.svn.wordpress.org/trunk@54491 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-theme-json-resolver.php

@@ -272,7 +272,7 @@ public static function get_theme_data( $deprecated = array(), $options = array()
 	public static function get_block_data() {
 		$registry = WP_Block_Type_Registry::get_instance();
 		$blocks   = $registry->get_all_registered();
-		$config   = array( 'version' => 1 );
+		$config   = array( 'version' => 2 );
 		foreach ( $blocks as $block_name => $block_type ) {
 			if ( isset( $block_type->supports['__experimentalStyle'] ) ) {
 				$config['styles']['blocks'][ $block_name ] = static::remove_json_comments( $block_type->supports['__experimentalStyle'] );