[Complete] Topnav: add 'Release' with proper handling

* topnav: add '릴리즈 (영문)'

_data/topnav.yml

@@ -3,6 +3,8 @@ topnav:
   items:
     - title: SDK 블로그 (영문)
       external_url: https://aka.ms/azsdk/blog
+    - title: 릴리즈 (영문)
+      external_url: https://aka.ms/azsdk/
 
 
 topnav_dropdowns: