Update action.yml

Danny McCormick · web-flow · commit 6c0e2a2a6b8d · 2019-09-12T10:37:27.000-04:00
diff --git a/action.yml b/action.yml
@@ -7,6 +7,7 @@ inputs:
 # Deprecated option, do not use. Will not be supported after October 1, 2019
   version:
     description: 'Deprecated. Use dotnet-version instead. Will not be supported after October 1, 2019'
+    deprecationMessage: 'The version property will not be supported after October 1, 2019. Use dotnet-version instead'
 runs:
   using: 'node12'
   main: 'lib/setup-dotnet.js'
