chore(deps): update rust crate rand_core to v0.9.4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
rand_core (source)	workspace.dependencies	patch	0.9.3 → 0.9.4

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Release Notes

rust-random/rand_core (rand_core)

v0.9.4

Compare Source

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[github-actions]

GNU testsuite comparison:

Skipping an intermittent issue tests/shuf/shuf-reservoir (passes in this run but fails in the 'main' branch)
Skipping an intermittent issue tests/sort/sort-stale-thread-mem (passes in this run but fails in the 'main' branch)