chore(Examples): [skip ci] Adjust speech to text example to include callback

maxnussbaum · maxnussbaum · commit d2c1b57b6d27 · 2018-08-07T08:28:44.000-04:00
diff --git a/examples/speech_to_text_v1.rb b/examples/speech_to_text_v1.rb
@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 require("ibm_watson/speech_to_text_v1")
+require("ibm_watson/websocket/recognize_callback")
 require("json")
 
 # If using IAM
