Update version.txt file path (#61177)
Summary:
The file version.txt is located one directory above generate_torch_version,
some platforms are unable to find this file unless given an explicit
path.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/61177
Reviewed By: pbelevich
Differential Revision: D29660334
Pulled By: ezyang
fbshipit-source-id: f66105f782aaff031e373f96a69baabb13c89337
