Docs: Correct @since version for COOKIE_DOMAIN default value change.

Follow-up to [58011].

Props mukesh27.
See #46550.

git-svn-id: https://develop.svn.wordpress.org/trunk@58017 602fd350-edb4-49c9-b593-d223f7449a82

Author: SergeyBiryukov

src/wp-includes/default-constants.php

@@ -325,7 +325,7 @@ function wp_cookie_constants() {
 
 	/**
 	 * @since 2.0.0
-	 * @since 6.5.0 The value has changed from false to an empty string.
+	 * @since 6.6.0 The value has changed from false to an empty string.
 	 */
 	if ( ! defined( 'COOKIE_DOMAIN' ) ) {
 		define( 'COOKIE_DOMAIN', '' );