hybrid-array: tweak ArraySize docs, remove static bound (#976) #473

Job	Run time
build (1.60.0, armv7a-none-eabi)	5m 24s
build (1.60.0, thumbv7em-none-eabi)	4m 28s
build (1.60.0, wasm32-unknown-unknown)	4m 25s
build (stable, armv7a-none-eabi)	11s
build (stable, thumbv7em-none-eabi)	9s
build (stable, wasm32-unknown-unknown)	9s
aarch64 (aarch64-unknown-linux-gnu, 1.60.0)	5m 51s
aarch64 (aarch64-unknown-linux-gnu, stable)	45s
cross (powerpc-unknown-linux-gnu, 1.60.0)	5m 41s
test (i686-unknown-linux-gnu, ubuntu-latest, 1.60.0, sudo apt update && sudo apt install gcc-mult...	5m 58s
cross (powerpc-unknown-linux-gnu, stable)	52s
test (i686-unknown-linux-gnu, ubuntu-latest, stable, sudo apt update && sudo apt install gcc-mult...	53s
test (x86_64-unknown-linux-gnu, ubuntu-latest, 1.60.0)	4m 35s
test (x86_64-unknown-linux-gnu, ubuntu-latest, stable)	35s
test (x86_64-apple-darwin, macos-latest, 1.60.0)	7m 4s
test (x86_64-apple-darwin, macos-latest, stable)	59s
test (x86_64-pc-windows-msvc, windows-latest, 1.60.0)	6m 1s
test (x86_64-pc-windows-msvc, windows-latest, stable)	1m 51s
minimal-versions / minimal-versions	1m 1s
	56m 52s

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