zig build: use multihash for the hash field

https://multiformats.io/multihash/

Still, only SHA2-256 is supported. This is only intended to future-proof
the hash field of the manifest.

closes #14284
24ff8a1a5fAndrew Kelley committed on 2/2/2023, 3:02:35 AMparentea6e0e3
1 file changedLine totals unavailable