Update changelog

Author: Nevcairiel

changelog.txt

@@ -1,3 +1,10 @@
+Ace3 Release - Revision r1390 (February 3rd, 2026)
+--------------------------------------------------
+- AceConfigDialog-3.0: The original category ID is now preserved in AddToBlizOptions in 12.0, making it mandatory for addons to store the second return value and forward it to Settings.OpenToCategory
+- AceConfig-3.0: Widgets can now specify a relative size with width="relative" and relWidth="0.5"
+- AceGUI-3.0: Keybinding: Add basic gamepad support
+- AceGUI-3.0: TreeGroup: Consistently provide an alpha value for GameTooltip:SetText
+
 Ace3 Release - Revision r1377 (October 28th, 2025)
 --------------------------------------------------
 - AceComm-3.0: Updated ChatThrottleLib for WoW 12.0