k256

Bump `hybrid-array` to v0.2.0-rc.11; MSRV 1.81 (#1092) #2257

Job	Run time
build (1.81.0, thumbv7em-none-eabi)	46s
build (1.81.0, wasm32-unknown-unknown)	49s
build (stable, thumbv7em-none-eabi)	51s
build (stable, wasm32-unknown-unknown)	43s
benches (1.81.0)	1m 24s
cross (armv7-unknown-linux-gnueabihf, 1.81.0)	1m 24s
benches (stable)	1m 15s
cross (armv7-unknown-linux-gnueabihf, stable)	1m 11s
cross (aarch64-unknown-linux-gnu, 1.81.0)	1m 19s
cross (aarch64-unknown-linux-gnu, stable)	1m 12s
cross (powerpc-unknown-linux-gnu, 1.81.0)	1m 21s
doc	1m 1s
cross (powerpc-unknown-linux-gnu, stable)	1m 47s
test (i686-unknown-linux-gnu, 1.81.0, sudo apt update && sudo apt install gcc-multilib)	1m 38s
test (i686-unknown-linux-gnu, stable, sudo apt update && sudo apt install gcc-multilib)	1m 31s
test (x86_64-unknown-linux-gnu, 1.81.0)	1m 26s
test (x86_64-unknown-linux-gnu, stable)	1m 15s
	20m 53s

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