Fix broken hyperlinks (#59425)
Summary:
**Overview:**
A number of the hyperlinks in the [`CONTRIBUTING.md` file](https://github.com/pytorch/pytorch/blob/master/torch/distributed/CONTRIBUTING.md) are broken since they include an extraneous `/torch/`. This PR fixes those links.
The files whose links are broken are
- `ProcessGroupNCCL.hpp`
- `Store.hpp`
- `FileStore.hpp`
- `TCPStore.hpp`
- `PrefixStore.hpp`
- `rref_impl.h`
- `rref_context.h`
Pull Request resolved: https://github.com/pytorch/pytorch/pull/59425
Test Plan:
The `CONTRIBUTING.md` file is at https://github.com/pytorch/pytorch/blob/master/torch/distributed/CONTRIBUTING.md.
`ProcessGroupNCCL.hpp` should have link https://github.com/pytorch/pytorch/blob/master/torch/lib/c10d/ProcessGroupGloo.hpp, which is equivalent to `../lib/c10d/ProcessGroupGloo.hpp`.
`Store.hpp` should have link https://github.com/pytorch/pytorch/blob/master/torch/lib/c10d/Store.hpp, which is equivalent to `../lib/c10d/Store.hpp`.
`FileStore.hpp` should have link https://github.com/pytorch/pytorch/blob/master/torch/lib/c10d/FileStore.hpp, which is equivalent to `../lib/c10d/FileStore.hpp`.
`PrefixStore.hpp` should have link https://github.com/pytorch/pytorch/blob/master/torch/lib/c10d/PrefixStore.hpp, which is equivalent to `../lib/c10d/PrefixStore.hpp`.
`rref_interface.h` should have link https://github.com/pytorch/pytorch/blob/master/aten/src/ATen/core/rref_interface.h, which is equivalent to `../../aten/src/ATen/core/rref_interface.h`.
`rref_context.h` should have link https://github.com/pytorch/pytorch/blob/master/torch/csrc/distributed/rpc/rref_context.h, which is equivalent to `../csrc/distributed/rpc/rref_context.h`.
Reviewed By: mruberry
Differential Revision: D28888188
Pulled By: andwgu
fbshipit-source-id: 023219184d42284ea1cbfcf519c1b4277dd5a02b
