fix margin above migration upgrade path boxes

Author: chrisvfritz

themes/vue/source/css/_migration.styl

@@ -4,11 +4,12 @@
             margin-left: .3em
             color: #b9465c
     .upgrade-path
+        margin-top: 2em
         padding: 2em
         background: rgba(73, 195, 140, .1)
         border-radius: 2px
         > h4
             margin-top: 0
         > p:last-child
             margin-bottom: 0
-
+            padding-bottom: 0