setting default build engine

browsers/edge/docfx.json

@@ -33,6 +33,7 @@
     "externalReference": [
     ],
     "template": "op.html",
-    "dest": "browsers/edge"
+    "dest": "browsers/edge",
+    "markdownEngineName": "dfm"
   }
 }

browsers/internet-explorer/docfx.json

@@ -34,6 +34,7 @@
     "externalReference": [
     ],
     "template": "op.html",
-    "dest": "edges/internet-explorer"
+    "dest": "edges/internet-explorer",
+    "markdownEngineName": "dfm"
   }
 }