docs: 更新CHANGELOG.md以包含2.3.0版本的变更

JustLookAtNow · JustLookAtNow · commit e10c017fa3c9 · 2025-08-08T16:10:27.000+08:00
* 新增：源分支字段现在为自动完成下拉框，类似目标分支，并预填充当前分支
* 修复：MR创建成功后Webview面板自动关闭
* 修复：目标分支选择现在能被正确记住并预填充
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # CHANGELOG
 
+## 2.3.0
+
+* Enhanced: Source branch field is now an autocomplete dropdown similar to target branch, prefilled with current branch.
+* Fixed: Webview panel now closes automatically after MR creation succeeds.
+* Fixed: Target branch selection is correctly remembered and prefilled.
+
 ## 2.2.0
 
 * Enhanced: Revamped label selection UI.
