Fix CI format check

[MaxVerevkin]

Apparently cargo fmt (and cargo fmt --check) doesn't work on blocks' files because their mod <module> is defined inside of a macro. This is a known limitation of cargo fmt: rust-lang/rustfmt#4078

I guess the CI should run something like rustfmt --check --edition 2021 $(fd -e rs) instead of cargo fmt --check?

Originally posted by @MaxVerevkin in #1644 (comment)