💄 new tabs style (#21256)

smaller bar width

components/page-header/style/index.less

@@ -151,7 +151,7 @@
         }
 
         .@{ant-prefix}-tabs-tab {
-          padding: 8px;
+          padding: @tabs-horizontal-padding-sm;
           font-size: 16px;
         }
       }

components/style/themes/default.less

@@ -604,9 +604,9 @@
 @tabs-bar-margin: 0 0 16px 0;
 @tabs-horizontal-margin: 0 32px 0 0;
 @tabs-horizontal-margin-rtl: 0 0 0 32px;
-@tabs-horizontal-padding: 12px 16px;
-@tabs-horizontal-padding-lg: 16px;
-@tabs-horizontal-padding-sm: 8px 16px;
+@tabs-horizontal-padding: 12px 0;
+@tabs-horizontal-padding-lg: 16px 0;
+@tabs-horizontal-padding-sm: 8px 0;
 @tabs-vertical-padding: 8px 24px;
 @tabs-vertical-margin: 0 0 16px 0;
 @tabs-scrolling-size: 32px;

docs/react/migration-v4.en-US.md

@@ -26,6 +26,7 @@ This document will help you upgrade from antd `3.x` version to antd `4.x` versio
 - The color brightness of the dividing line has been reduced from `#E8E8E8` to`#F0F0F0`.
 - DatePicker interactive redo, range selection can now select start and end time separately.
 - Table change default background color from transparent to white.
+- Smaller Tabs bar width.
 
 ### Compatibility
 

docs/react/migration-v4.zh-CN.md

@@ -26,6 +26,7 @@ title: 从 v3 到 v4
 - 分割线颜色明度降低，由 `#E8E8E8` 改为 `#F0F0F0`。
 - DatePicker 交互重做，面板和输入框分离，范围选择现可单独选择开始和结束时间。
 - Table 默认背景颜色从透明修改为白色。
+- Tabs 火柴棍样式缩短为和文字等长。
 
 ### 兼容性调整