API Update code to reflect changes in silverstripe/cms

src/Model/Blog.php

@@ -144,7 +144,7 @@ class Blog extends Page implements PermissionProvider
      * @var string
      * @deprecated 5.4.0 use class_description instead.
      */
-    private static $description = 'Adds a blog to your website.';
+    private static $class_description = 'Adds a blog to your website.';
 
     private static $class_description = 'Adds a blog to your website.';