Merge commit '7dd06c8417679e41d2ad661707a0b3071ca0efff' into doc-updater

Author: Peter Amstutz

cwltool/schemas/draft-3/Workflow.yml

@@ -378,8 +378,8 @@ $graph:
   extends: "#Process"
   documentRoot: true
   specialize:
-    specializeFrom: "#OutputParameter"
-    specializeTo: "#WorkflowOutputParameter"
+    - specializeFrom: "#OutputParameter"
+      specializeTo: "#WorkflowOutputParameter"
   doc: |
     A workflow describes a set of **steps** and the **dependencies** between
     those processes.  When a process produces output that will be consumed by a