Pin libuv to 1.39 in Windows CI in order to keep version alignment in read me document (#46015)
Summary:
Fixes #{issue number}
Pull Request resolved: https://github.com/pytorch/pytorch/pull/46015
Reviewed By: mruberry
Differential Revision: D24193319
Pulled By: mrshenli
fbshipit-source-id: b300116e7ed189a888cb980b63c67d1d402b01b9
