update changelog for 1.2.0 release

Author: GooberRF

docs/CHANGELOG.md

@@ -1,7 +1,7 @@
 ⚙️⛏ Alpine Faction Changelog ⛏⚙️
 ===================================
 
-Version 1.2.0 (Willow): Not yet released
+Version 1.2.0 (Willow): Released Dec-06-2025
 --------------------------------
 ### Major features
 [@GooberRF](https://github.com/GooberRF)

setup/setup.iss

@@ -2,7 +2,7 @@
 #define SrcRootDir ".."
 #define BinDir "..\build\Release\bin"
 #define PatchesDir "patches\output"
-#define AppVer "1.2.0-dev_Willow"
+#define AppVer "1.2.0_Willow"
 
 [Setup]
 AppId={{005AA7-D71920-FFC72C-4B6E-82D3-9F7B12A3C8D1}}