change 2 instances of blacklist to blocklist in tools/pyi/gen_pyi.py (#41979)
Summary:
Fixes https://github.com/pytorch/pytorch/issues/41722
Pull Request resolved: https://github.com/pytorch/pytorch/pull/41979
Reviewed By: ngimel
Differential Revision: D22764112
Pulled By: zou3519
fbshipit-source-id: 3f8580c96cf45078a9df3cd9ca6fdb10d58e143f
