(DOCSP-7993) Add missing date to release notes (#203)

Author: zach-carr

source/release-notes.txt

@@ -13,7 +13,7 @@ Release Notes
 |compass| 1.20
 --------------
 
-*Released November, 2019*
+*Released December 5, 2019*
 
 - New and improved :ref:`Connection <connect-run-compass>` experience
   with support for all connection options.