RD-1001 Update changelog correctly

Author: Les Moffat

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 ## 3.4.0
 ### ✨ Features and improvements
-None
+- Now able to include cubemap background images and Earth radial gradient halo via `space` and `halo` in map constructor _or_ via `setSpace` or `setHalo` methods _or_ via incoming MT style spec.
 
 ### 🐛 Bug fixes
 - Fix for [RD-900](https://maptiler.atlassian.net/browse/RD-900?atlOrigin=eyJpIjoiOTRjZGRhYjg2Y2JhNGY2NGI2NzM2M2E1MGNkNjBmYWYiLCJwIjoiaiJ9)