build(deps): update rand requirement from 0.8 to 0.9 #1506

Job	Run time
actionlint	6s
build with no_std (ristretto255)	20s
build with MSRV (1.66.1)	2m 34s
build with default features	30s
build with no_std (ed25519)	25s
Clippy	39s
build with no_std (p256)	21s
Check Rust doc	34s
Rustfmt	10s
build with no_std (secp256k1)	21s
build with no_std (secp256k1-tr)	23s
Check if automatically generated code is up to date	17s
build with no_std (rerandomized)	17s
test on beta	1m 12s
	8m 9s

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