Hash input inconsistent

[b-wagn]

Input for hash in rust code is inconsistent with input for hash in pseudocode.

• Rust code says "pk,mes,r"
• Pseudocode says "r,pk,mes"

[jonasnick]

Thanks! Fixed in https://github.com/BlockstreamResearch/cross-input-aggregation/commit/9157e2733cd01efb4ffbca7dc96d61e89aaa4ca3.