[Docs] Dead link for resnet

[shaoyuyoung]

In TVM doc here: https://tvm.apache.org/docs/tutorial/autotvm_relay_x86.html#downloading-and-loading-the-onnx-model

The link of resnet is dead ⚠️ https://github.com/onnx/models/raw/main/vision/classification/resnet/model/resnet50-v2-7.onnx

The right link is : https://github.com/onnx/models/raw/main/validated/vision/classification/resnet/model/resnet50-v2-7.onnx

[shaoyuyoung]

cc @ysh329

[lhutton1]

Thanks for raising this @shaoyuyoung, feel free to send a PR to fix it

Edit: looks like a PR already exists :) #17015

[shaoyuyoung]

yeah, I have noticed that.

However, this dead link also exists in other files.

I would send a PR to address this :D