Fix husky fmt hook.

.cargo-husky/hooks/pre-commit

@@ -1,7 +1,7 @@
 #!/bin/bash
 set -e
 
-cargo +nightly fmt
+cargo +nightly fmt -- --check
 
 cargo +nightly clippy --workspace --tests --all-targets --all-features -- \
     -D warnings -D deprecated -D clippy::perf -D clippy::complexity -D clippy::dbg_macro