Updated tk-framework-widget to v1.2.1

Release notes: https://github.com/shotgunsoftware/tk-framework-widget/wiki/Release-Notes#v121

Author: toolkitty

env/includes/common/frameworks.yml

@@ -39,7 +39,7 @@ frameworks:
       name: tk-framework-adminui
   tk-framework-widget_v1.x.x:
     location:
-      version: v1.2.0
+      version: v1.2.1
       type: app_store
       name: tk-framework-widget
   tk-framework-desktopserver_v1.x.x: