Update to CFF format. (#696)
Summary:
CITATION.cff file needs to be in a special CFF format, not BibTeX.
Otherwise Github can't use it and complains "Your CITATION.cff file cannot be parsed. Make sure the formatting is correct."
Correct CFF will be converted to BibTex by Github (see https://github.blog/2021-08-19-enhanced-support-citations-github/)
If a separate BibTex file is desired, previous CITATION.cff can be renamed to just CITATION.
Pull Request resolved: https://github.com/pytorch/benchmark/pull/696
Reviewed By: xuzhao9
Differential Revision: D33640556
Pulled By: orionr
fbshipit-source-id: ac8d98e27a222843c7574fca63e758d8b9a650dc
