fix joke api call to only call correct joke format

Author: devloglogan

reading/apis.livemd

@@ -316,7 +316,7 @@ APIs commonly return a JSON response. For example, here we make a request to a J
 
 ```elixir
 response =
-  Finch.build(:get, "https://v2.jokeapi.dev/joke/Any?safe-mode&format=json")
+  Finch.build(:get, "https://v2.jokeapi.dev/joke/Any?safe-mode&type=single&format=json")
   |> Finch.request!(MyApp.Finch)
 ```