Prebuilt binaries don't match checksums

[sudocurse]

Here:

% shasum -a 256 grit-aarch64-apple-darwin.tar.gz.tar
2a7841d95ad683db109baa9481a96245478dfdb1cf899ff9e549e6c54b4bbf0c  grit-aarch64-apple-darwin.tar.gz.tar
% cat grit-aarch64-apple-darwin.tar.gz.sha256
7ab8c7eea90799ae35c86f2a9b7e48e56b91a62e6a459b910dde1a3daa066bf3 *grit-aarch64-apple-darwin.tar.gz

% shasum -a 256 grit-x86_64-apple-darwin.tar.gz.tar
53b61c47b66d5a15115204cb91be3850e5c532e5a75be06b77b057b27c154d90  grit-x86_64-apple-darwin.tar.gz.tar
% cat grit-x86_64-apple-darwin.tar.gz.sha256
b502f031cfe72b58e193282faf53531a5aac01c7bfa779421fc52652b652010e *grit-x86_64-apple-darwin.tar.gz

The release .tar.gz.tar (which is weird, does Github usually do this?) doesn't even seem to be an actual tar.gz inside

% tar -tf grit-aarch64-apple-darwin.tar.gz.tar
grit-aarch64-apple-darwin/
grit-aarch64-apple-darwin/grit