Fix typo in Github links in elementwise_ops_schema.cc (#18018)
Summary:
s/elementwise_op_schema.cc/elementwise_ops_schema.cc
Pull Request resolved: https://github.com/pytorch/pytorch/pull/18018
Differential Revision: D14612291
Pulled By: soumith
fbshipit-source-id: 09276283b9ff92c039ce530165c62cc8421fb443
