Fix attached step spacing

RELEASE-NOTES.md

@@ -54,6 +54,7 @@
 - **Rating** - rating does not fire `onRate` when rating is initialized #3712
 - **Segment/Message** - `top attached message` has no border when attached to `segment` #3619
 - **Segment** - Fixed `segments` to not clip border radius when only a **single** segment is included
+- **Step** - Fix incorrect bottom margin on `top attached steps`
 - **Statistic** - statistic receives incorrect size when using `tiny` `large` etc inside a statistic group #3116
 - **Table** - `striped selectable` table would not correctly show hover color on striped rows
 

src/themes/default/elements/step.variables

@@ -94,7 +94,7 @@
 --------------------*/
 
 @attachedHorizontalOffset: -@borderWidth;
-@attachedVerticalOffset: -@borderWidth;
+@attachedVerticalOffset: 0;
 @attachedWidth: ~"calc(100% + "-@attachedHorizontalOffset * 2~")";
 
 @orderedFontFamily: inherit;