chore(docs): Update changelog of 4.12.3

CHANGELOG.en-US.md

@@ -17,12 +17,14 @@ timeline: true
 
 ## 4.12.3
 
-`2021-02-09`
+`2021-02-10`
 
 - 🛠 Refactor Drawer with React hooks. [#29229](https://github.com/ant-design/ant-design/pull/29229)
 - 🐞 Fix Table pagination not disappear when `pagination.position` is `['none', 'none']`. [#29256](https://github.com/ant-design/ant-design/pull/29256) [@mumiao](https://github.com/mumiao)
 - 🐞 Fix TextArea `showCount` should not be interactive. [#29245](https://github.com/ant-design/ant-design/pull/29245)
 - 🐞 Fix abnormal background color for `multiple` and `disabled` Select in dark. [#29242](https://github.com/ant-design/ant-design/pull/29242)
+- ⚡️ Optimize Slider align performance of tooltip. [#29308](https://github.com/ant-design/ant-design/pull/29308) [@kerm1it](https://github.com/kerm1it)
+- ⚡️ Upgrade `@ant-design/colors` to 6.x to reduce gzipped bundle size `1KB`. [#29307](https://github.com/ant-design/ant-design/pull/29307) [@07akioni](https://github.com/07akioni)
 - 🇷🇺 Add `ru_RU` locale text for Image. [#29271](https://github.com/ant-design/ant-design/pull/29271) [@mumiao](https://github.com/mumiao)
 - 🇮🇷 Add `fa_IR` locale text for DatePicker, Form, Table, TimePicker and Transfer. [#29232](https://github.com/ant-design/ant-design/pull/29232) [@amiralitaheri](https://github.com/amiralitaheri)
 - TypeScript

CHANGELOG.zh-CN.md

@@ -17,12 +17,14 @@ timeline: true
 
 ## 4.12.3
 
-`2021-02-09`
+`2021-02-10`
 
 - 🛠 使用 React hooks 重构 Drawer。[#29229](https://github.com/ant-design/ant-design/pull/29229)
 - 🐞 修复 Table 的 `pagination. position` 为 `['none', 'none']`时分页器仍然展示的问题。[#29256](https://github.com/ant-design/ant-design/pull/29256) [@mumiao](https://github.com/mumiao)
 - 🐞 修复 TextArea `showCount` 字数会遮挡 Form.Item `extra` 的问题。[#29245](https://github.com/ant-design/ant-design/pull/29245)
 - 🐞 修复多选 Select 在暗黑模式下禁用的背景颜色异常的问题。[#29242](https://github.com/ant-design/ant-design/pull/29242)
+- ⚡️ 优化 Slider 提示的对齐性能。[#29308](https://github.com/ant-design/ant-design/pull/29308) [@kerm1it](https://github.com/kerm1it)
+- ⚡️ 升级 `@ant-design/colors` 依赖到 6.x，减少 gzipped 包体积 `1KB`。[#29307](https://github.com/ant-design/ant-design/pull/29307) [@07akioni](https://github.com/07akioni)
 - 🇷🇺 为 Image 组件添加 `ru_RU` 俄语翻译。[#29271](https://github.com/ant-design/ant-design/pull/29271) [@mumiao](https://github.com/mumiao)
 - 🇮🇷 为 DatePicker、Form、Table、TimePicker 和 Transfer 组件添加 `fa_IR` 波斯语翻译。[#29232](https://github.com/ant-design/ant-design/pull/29232) [@amiralitaheri](https://github.com/amiralitaheri)
 - TypeScript