fix: sm select placeholder

Author: tangjinzhou

components/select/style/multiple.ts

@@ -213,7 +213,7 @@ export default function genMultipleStyle(token: SelectToken): CSSInterpolation {
       [`${componentCls}-multiple${componentCls}-sm`]: {
         [`${componentCls}-selection-placeholder`]: {
           insetInlineStart: token.controlPaddingHorizontalSM - token.lineWidth,
-          insetInlineEnd: 'auto',
+          insetInlineEnd: token.controlPaddingHorizontalSM - token.lineWidth,
         },
 
         // https://github.com/ant-design/ant-design/issues/29559