message: Fix dead link for Syntax.md
  Fix dead link for Syntax.md
diff: @@ -287,7 +287,7 @@ variable_length_model = update_model_dims.update_inputs_outputs_dims(model, {'in
  ## ONNX Parser
  Functions `onnx.parser.parse_model` and `onnx.parser.parse_graph` can be used to create an ONNX model
  -or graph from a textual representation as shown below. See [Language Syntax](syntax.md) for more details
  +or graph from a textual representation as shown below. See [Language Syntax](Syntax.md) for more details
  about the language syntax.
  ```python
  