message: Fix broken links in docs/Optimizer.md
diff: @@ -33,7 +33,7 @@ ModelProto Optimize(
  which accepts an input `ModelProto` and a list of optimization passes to
  apply, and which returns a new `ModelProto` which is the result of
  applying each of the named passes in sequence to the model. For a list
  -of available passes, see [optimize.h](onnx/optimizer/optimize.h).
  +of available passes, see [optimize.h](/onnx/optimizer/optimize.h).
  ## Implementing Optimization Passes
  @@ -41,8 +41,8 @@ You can implement a new optimization pass by subclassing
  `OptimizePass`, and registering your new pass with
  `Optimizer::registerOptimizer()`. Optimization passes operate (at your
  option) either directly on the protobuf structs, or on an in-memory
  -graph representation defined in [ir.h](onnx/common/ir.h). There are a
  -number of examples in the [passes](onnx/optimizer/passes) directory.
  +graph representation defined in [ir.h](/onnx/common/ir.h). There are a
  +number of examples in the [passes](/onnx/optimizer/passes) directory.
  If your pass is at all generally applicable, please consider adding it
  to the core ONNX repository.
  