Add support for BLAKE3 hash to fetchurl

**Is your feature request related to a problem? Please describe.**
No.

**Describe the solution you'd like**
As an alternative to md5, sha1, sha256, and sha512, I would like to use [BLAKE3](https://github.com/BLAKE3-team/BLAKE3).

**Describe alternatives you've considered**
N/A.

**Additional context**
N/A.

**Priorities**
N/A.
