Hi Peter,
The checksums are for the binaries (dgraph/Badger) inside the compressed tar bundles.
You should first extract the tar.gz bundles and then run sha256sum on the resulting Badger and Dgraph binaries as following:
% sha256sum dgraph ( AMD Binary)
5c8d5ee8fd0c092cbaf80f5fbbd4cddb1db478d2eb4ee9e244e638abaef5a233 dgraph
% % sha256sum badger-linux-amd64 ( AMD Binary)
928b06638a9cb332372f98df1ebb4c73a05a7de02bd828e1b849d67a7ec5c5af badger-linux-amd64
As you can see, the checksums are matching from my execution.
Hope that helps
Thanks
-Megha