Update changelog

CHANGELOG.md

@@ -13,6 +13,7 @@ For a more detailed list of past and incoming changes, see the commit history.
 - Added `HTerrainData.reload` function to allow reloading a terrain while the game is running (after saving in the editor)
 - Update properties in the inspector when a custom shader is modified
 - Added support for importing and exporting 32-bit raw files
+- Allow to set brush size and opacity size with spinboxes (thanks to Vercix)
 - Exposed specular parameter in ground shaders
 - Fixed brush cursor looked off-center at close range when using tiny brush sizes
 - Fixed error when trying to change `TextureSet` mode while it has textures in it