Updated tk-framework-adminui to v0.8.1

Release notes: https://github.com/shotgunsoftware/tk-framework-adminui/releases/tag/v0.8.1

Author: Toolkitty

env/includes/frameworks.yml

@@ -22,7 +22,7 @@ frameworks:
       name: tk-framework-adobe
   tk-framework-adminui_v0.x.x:
     location:
-      version: v0.8.0
+      version: v0.8.1
       type: app_store
       name: tk-framework-adminui
   tk-framework-alias_v1.x.x: