Update .openpublishing.publish.config.json

.openpublishing.publish.config.json

@@ -60,10 +60,10 @@
 	"dependent_packages": [
 		{
 			"id": "Microsoft.DocAsCode.ECMA2Yaml",
-			"nuget_feed": "https://www.myget.org/F/op/api/v2",
+			"nuget_feed": "https://www.myget.org/F/op-dev/api/v2",
 			"path_to_root": "_dependentPackages/ECMA2Yaml",
 			"target_framework": "net45",
-			"version": "latest"
+			"version": "latest-prerelease"
 		},
 		{
 			"id": "Microsoft.OpenPublishing.CommonPlugins",