Bump codecov/codecov-action from 3.1.5 to 4.0.1 #705

Job	Run time
Audit dependencies	29s
Build and test (stable, ubuntu-latest, x86_64-unknown-linux-gnu)	1m 10s
Build and test (beta, ubuntu-latest, x86_64-unknown-linux-gnu)	1m 53s
Build and test (msrv, ubuntu-latest, x86_64-unknown-linux-gnu)	1m 17s
Clippy (x86_64-unknown-linux-gnu, false, true)	44s
Build and test (stable, ubuntu-latest, x86_64-unknown-linux-musl)	1m 19s
Clippy (armv7-unknown-linux-gnueabihf, true, false, -target arm-linux-gnueabihf -mcpu=generic+v7a...	37s
Build and test (stable, macos-latest, x86_64-apple-darwin)	1m 31s
Clippy (x86_64-unknown-linux-musl, true, false, -target x86_64-linux-musl)	36s
Build and test (stable, ubuntu-latest, --all-features, x86_64-unknown-linux-gnu)	1m 14s
Clippy (x86_64-apple-darwin, true, false, -target x86_64-macos-gnu -g)	40s
Build and test (msrv, ubuntu-latest, --all-features, x86_64-unknown-linux-gnu)	1m 33s
Build and test (stable, ubuntu-latest, --all-features, x86_64-unknown-linux-musl)	1m 23s
Build and test (stable, macos-latest, --all-features, x86_64-apple-darwin)	2m 20s
Format	8s
Smoke-test fuzzing targets	4m 22s
Validate man pages	10s
Smoke-test fuzzing targets (--all-features)	2m 6s
Check unused dependencies	57s
Validate configs	31s
	25m 0s

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