fix:typo (#2808)

api/core/model_runtime/entities/model_entities.py

     DEFAULT_VOICE = "default_voice"
     VOICES = "voices"
     WORD_LIMIT = "word_limit"
-    AUDOI_TYPE = "audio_type"
+    AUDIO_TYPE = "audio_type"
     MAX_WORKERS = "max_workers"
 
 

api/core/model_runtime/model_providers/__base/tts_model.py

         """
         model_schema = self.get_model_schema(model, credentials)
 
-        if model_schema and ModelPropertyKey.AUDOI_TYPE in model_schema.model_properties:
-            return model_schema.model_properties[ModelPropertyKey.AUDOI_TYPE]
+        if model_schema and ModelPropertyKey.AUDIO_TYPE in model_schema.model_properties:
+            return model_schema.model_properties[ModelPropertyKey.AUDIO_TYPE]
 
     def _get_model_word_limit(self, model: str, credentials: dict) -> int:
         """

api/core/model_runtime/model_providers/azure_openai/_constant.py

                     },
                 ],
                 ModelPropertyKey.WORD_LIMIT: 120,
-                ModelPropertyKey.AUDOI_TYPE: 'mp3',
+                ModelPropertyKey.AUDIO_TYPE: 'mp3',
                 ModelPropertyKey.MAX_WORKERS: 5
             },
             pricing=PriceConfig(
                     },
                 ],
                 ModelPropertyKey.WORD_LIMIT: 120,
-                ModelPropertyKey.AUDOI_TYPE: 'mp3',
+                ModelPropertyKey.AUDIO_TYPE: 'mp3',
                 ModelPropertyKey.MAX_WORKERS: 5
             },
             pricing=PriceConfig(