Update UPGRADE.md

ifours · web-flow · commit b9e26038bb6a · 2019-08-30T15:13:57.000+03:00
diff --git a/UPGRADE.md b/UPGRADE.md
@@ -91,7 +91,7 @@ Use
 ```javascript
 const components = {
   AddCardLink:      () => <button>New Card</button>,
-  CustomLaneHeader: CustomLaneHeader,
+  LaneHeader: CustomLaneHeader,
   NewCardForm:      NewCard,
   NewLaneSection:   NewLane,
   Card:             CustomCard
