Better control of gfx modes

CHANGELOG.md

@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+
+# [3.7.1] - 2021-06-11
 ### Changed
 - Refine graphics mode switching:
   + Disallow switching to compute or vfio mode unless existing mode is "Integrated"