Add API change for Multiple Flows

Author: krice-nw

changes.md

@@ -1,5 +1,13 @@
 # Change Log
 
+XD Release 32.0.12 (August 2020)
+-------------------------------------
+
+### New feature
+* **Multiple Flows** -- Designers can now author multiple prototype or interaction flows in a single document. For any document that includes multiple flow support 
+[HomeArtboard](./reference/scenegraph.md#SceneNode-horizontalConstraints) API will return the most upper left artboard and [isHomeArtBoard]() will only return `true` for the most upper left artboard.
+
+
 XD Release 30.0.12 (June 2020)
 -------------------------------------