fix: `Sealed::hash` serde (#805) #2160

Job	Run time
docs	55s
check no_std	56s
clippy	1m 12s
features stable	2m 43s
fmt	11s
miri --no-default-features	5m 0s
features stable --all-targets	3m 22s
features nightly	2m 31s
miri	5m 15s
features nightly --all-targets	3m 53s
miri --all-features	7m 34s
test ubuntu-latest stable --no-default-features	1m 15s
test ubuntu-latest stable	1m 10s
wasm	40s
test ubuntu-latest nightly --no-default-features	1m 20s
test ubuntu-latest nightly	1m 15s
test ubuntu-latest 1.79 --no-default-features	37s
test ubuntu-latest 1.79	42s
test windows-latest stable --no-default-features	2m 40s
test windows-latest stable	2m 45s
test windows-latest nightly --no-default-features	3m 21s
test windows-latest nightly	3m 8s
test windows-latest 1.79 --no-default-features	1m 29s
test windows-latest 1.79	2m 25s
test ubuntu-latest 1.79 --features json	38s
test windows-latest 1.79 --features json	2m 27s
test ubuntu-latest nightly --all-features	1m 26s
test windows-latest nightly --all-features	3m 8s
ci success	3s
	1h 4m 1s

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