chore: update nightly to 2024-01-20 #1321

Job	Run time
changed_paths	5s
build boot image (x86_64)	3m 7s
cargo check (host)	3m 29s
clippy	2m 49s
Loom tests (cordyceps)	1m 34s
Miri tests (codyceps)	2m 10s
docs	4m 15s
Loom tests (maitake)	4m 20s
Tests (maitake, no-default-features)	1m 42s
rustfmt	15s
cargo test (host)	4m 49s
cargo test (cross x64)	4m 30s
Loom tests (mycelium-util)	54s
	33m 59s

Provide feedback