fix: remove the undefined variable line (#9446)

api/core/model_runtime/model_providers/sagemaker/speech2text/speech2text.py

     InvokeRateLimitError,
     InvokeServerUnavailableError,
 )
+from core.model_runtime.errors.validate import CredentialsValidateFailedError
 from core.model_runtime.model_providers.__base.speech2text_model import Speech2TextModel
 from core.model_runtime.model_providers.sagemaker.sagemaker import generate_presigned_url
 
             json_obj = json.loads(json_str)
             asr_text = json_obj["text"]
         except Exception as e:
-            logger.exception(f"Exception {e}, line : {line}")
+            logger.exception(f"failed to invoke speech2text model, {e}")
+            raise CredentialsValidateFailedError(str(e))
 
         return asr_text