docs: 3.26.6 changelog (#20647)

* 3.26.6 changelog

* add v3 notify

CHANGELOG.en-US.md

@@ -15,6 +15,15 @@ timeline: true
 
 ---
 
+## 3.26.6
+
+`2019-01-03`
+
+- 📢 v3 branch changes from `master` to `3.x-stable` and v4 merge into `master`.
+- 💄 Improve Steps `type="navigation"` UI in small screen. [#20545](https://github.com/ant-design/ant-design/pull/20545)
+- 🐞 Fix `message.xxx` pass `null` will failed. [#20546](https://github.com/ant-design/ant-design/pull/20546)
+- 🐞 Remove Input.Password `value` attribute from dom. [#20544](https://github.com/ant-design/ant-design/pull/20544)
+
 ## 3.26.5
 
 `2019-12-29`

CHANGELOG.zh-CN.md

@@ -15,6 +15,15 @@ timeline: true
 
 ---
 
+## 3.26.6
+
+`2019-01-03`
+
+- 📢 v3 分支由 `master` 进入 `3.x-stable`，v4 合入 `master`。
+- 💄 优化 Steps `type="navigation"` 在小屏幕下的样式。[#20545](https://github.com/ant-design/ant-design/pull/20545)
+- 🐞 修复 `message.xxx` 传入 `null` 会报错的问题。[#20546](https://github.com/ant-design/ant-design/pull/20546)
+- 🐞 优化 Input.Password 在 dom 中明文显示 `value` 属性的问题。[#20544](https://github.com/ant-design/ant-design/pull/20544)
+
 ## 3.26.5
 
 `2019-12-29`

package.json

@@ -1,6 +1,6 @@
 {
   "name": "antd",
-  "version": "3.26.5",
+  "version": "3.26.6",
   "description": "An enterprise-class UI design language and React components implementation",
   "keywords": [
     "ant",