Tries to stabilize MSRV CI/CD. #393

Job	Run time
Pass MSRV values to other jobs	2s
clippy/stable	10s
format/nightly	12s
nostd/thumbv6m-none-eabi/stable	11s
cross_test/i686-unknown-linux-gnu/stable	1m 16s
cross_test/s390x-unknown-linux-gnu/stable	5m 29s
docs/nightly	19s
cargo-careful	1m 49s
miri	7m 59s
blas-msrv	55s
tests/stable	2m 38s
tests/beta	2m 29s
tests/1.64.0	4m 26s
tests/nightly	2m 36s
conclusion	3s
	30m 34s

Provide feedback