feat: update API specifications (#60)

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Author: deepgram-robot

asyncapi.yml

@@ -383,8 +383,8 @@ channels:
           - '1'
       diarize:
         description: >-
-          Recognize speaker changes. Each word in the transcript will be
-          assigned a speaker number starting at 0
+          Defaults to `false`. Recognize speaker changes. Each word in the
+          transcript will be assigned a speaker number starting at 0
         location: $message.payload#/diarize
         default: 'false'
         enum: