Remove bumping `codecov-action` to v4 (#422) #913

Job	Run time
lint	25s
clippy (stable)	1m 36s
clippy (beta)	2m 5s
build (stable)	1m 49s
sort	1m 12s
build (beta)	2m 0s
deny (advisories)	54s
build (nightly-2022-12-13)	2m 21s
deny (bans licenses sources)	45s
build-all-features (stable)	2m 1s
build-all-features (beta)	1m 54s
coverage	3m 0s
build-all-features (nightly-2022-12-13)	2m 58s
doc (stable)	1m 7s
test (stable)	5m 10s
doc (beta)	1m 14s
test (beta)	4m 54s
test (nightly-2022-12-13)	4m 38s
build-no-alloc (thumbv6m-none-eabi)	1m 56s
build-no-alloc (thumbv7m-none-eabi)	2m 2s
build-no-alloc (thumbv8m.main-none-eabi)	2m 7s
build-no-alloc (aarch64-linux-android)	2m 19s
build-no-alloc (aarch64-apple-ios)	2m 2s
build-no-alloc (wasm32-unknown-unknown)	2m 27s
notify	9s
	53m 5s

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