fix: steps dot style, close #199

Author: tangjinzhou

components/steps/style/index.less

@@ -25,7 +25,7 @@
 @steps-small-icon-size: 24px;
 @steps-dot-size: 8px;
 @steps-current-dot-size: 10px;
-@steps-desciption-max-width: 150px;
+@steps-desciption-max-width: 140px;
 
 .@{steps-prefix-cls} {
   .reset-component;