Update optimum_encoder.py

optimum_encoder.py

@@ -72,7 +72,7 @@ class OptimumEncoder(BaseEncoder):
             model_id=self.name, 
             file_name='model_fp16.onnx',
             subfolder='onnx',
-            provider=['TensorrtExecutionProvider'],
+            provider='TensorrtExecutionProvider',
             provider_options=provider_options,
             session_options=session_options,
             **self.model_kwargs