Update mock layout

Author: camdecoster

test/image/mocks/zz-scatter_marker_line_dash.json

@@ -74,7 +74,7 @@
       "range": [0, 7]
     },
     "yaxis": {
-      "range": [0, 4]
+      "range": [0, 5]
     },
     "width": 600,
     "height": 400