Bumps readable file format version for torch.full inferring float from int values (#40089)
Summary:
Reserves file format version 5 for marking when torch.full(int)->FloatTensor will be deprecated.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/40089
Differential Revision: D22066359
Pulled By: mruberry
fbshipit-source-id: 6158e03ca75e3795a2641123ff23d67975170f44
