remove default from action file

Author: lehmanmj

action.yml

@@ -76,7 +76,6 @@ inputs:
   output-env-credentials:
     description: Whether to export credentials as environment variables. If you set this to false, you probably want to use output-credentials.
     required: false
-    default: "true"
   unset-current-credentials:
     description: Whether to unset the existing credentials in your runner. May be useful if you run this action multiple times in the same job
     required: false