Improved consisntancy of spacing in 0.6 release notes

docs/releases/0.6.rst

@@ -23,6 +23,7 @@ Minor features
  * MenuItems can now have bundled JavaScript
  * Added a new hook for registering admin menu items. See :ref:`register_admin_menu_item`
 
+
 Bug fixes
 ~~~~~~~~~
 
@@ -30,6 +31,7 @@ Bug fixes
  * Search results in the page chooser now respect the page_type parameter on PageChooserPanel.
  * Rendition filenames are now prevented from going over 60 chars, even with a large focal_point_key.
 
+
 Upgrade considerations
 ======================
 
@@ -43,4 +45,4 @@ Deprecated features
 ===================
 
  * The ``wagtail.wagtailsearch.indexed`` module has been renamed to ``wagtail.wagtailsearch.index``
- 
+