chore(docs): Update doc headers (#26) #47

Job	Run time
clippy	28s
docs	19s
doctest	19s
cfg-check	26s
examples	1m 2s
feature-checks	36s
feature-powerset	3m 9s
fmt	13s
no-std	24s
wasm-unknown	37s
test stable --no-default-features	31s
wasm-wasi	32s
test stable	52s
test stable --all-features	1m 5s
test nightly --no-default-features	34s
test nightly	56s
test nightly --all-features	1m 19s
test 1.81 --no-default-features	26s
test 1.81	34s
	14m 22s

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