fix: empty space-item are not been hidden (#7557)

Author: lchrennew

components/space/style/index.tsx

@@ -38,7 +38,7 @@ const genSpaceStyle: GenerateStyle<SpaceToken> = token => {
           alignItems: 'baseline',
         },
       },
-      [`${componentCls}-space-item`]: {
+      [`${componentCls}-item`]: {
         '&:empty': {
           display: 'none',
         },