Mention the used rand version 0.9 in ndarray-rand #521

Job	Run time
Pass MSRV values to other jobs	4s
clippy/stable	29s
docs/nightly	22s
format/nightly	15s
miri	10m 54s
nostd/thumbv6m-none-eabi/stable	17s
cargo-careful	2m 22s
cross_test/i686-unknown-linux-gnu/stable	2m 2s
cross_test/s390x-unknown-linux-gnu/stable	9m 11s
blas-msrv	59s
tests/stable	2m 10s
tests/1.64.0	3m 17s
tests/nightly	3m 6s
tests/beta	2m 38s
conclusion	3s
	38m 9s

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