chore: v48 bump versions and changelogs (#1831) #4445

Job	Run time
clippy	1m 32s
check no_std	25s
check	23s
check no_std optimism,kzg-rs	30s
check serde	31s
docs	1m 27s
check std	27s
fmt	13s
test stable --no-default-features	1m 15s
test stable	1m 17s
TyposCheck	7s
test stable --all-features	1m 16s
test beta --no-default-features	1m 48s
test beta	1m 50s
test beta --all-features	1m 47s
test nightly --no-default-features	1m 17s
test nightly	1m 19s
test nightly --all-features	1m 30s
	18m 54s

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