message: Fix Actor docs link
diff: @@ -184,7 +184,7 @@ this by following the actor model, which doesn't nest function calls, but
  returns messages that will be executed later. This means all state that is
  carried over between one call and the next happens in storage and not in memory.
  For more information on this design, I recommend you read
  -[our docs on the Actor Model](https://docs.cosmwasm.com/0.13/architecture/actor.html).
  +[our docs on the Actor Model](https://docs.cosmwasm.com/docs/1.0/architecture/actor).
  ### Submessages
  