Bump rand from 0.9.2 to 0.9.4 in /tests/hello-rustls #1409

Job	Run time
Clippy	14s
Check	15s
Rustfmt	7s
spellcheck	8s
Test Suite (ubuntu-latest, stable, master)	19m 51s
Test Suite (ubuntu-latest, 1.88.0, 0.15.2)	20m 14s
Test Suite (ubuntu-latest, 1.88.0, 0.11.0)	18m 1s
Test Suite (macos-15, stable, 0.11.0)	12m 9s
Test Suite (macos-15, stable, 0.15.2)	17m 50s
Test Suite (ubuntu-latest, nightly, 0.11.0)	18m 1s
Test Suite (ubuntu-latest, stable, 0.15.2)	20m 38s
Test Suite (ubuntu-latest, nightly, 0.15.2)	19m 59s
Test Suite (macos-15, stable, master)	24m 17s
Test Suite (macos-15, nightly, master)	22m 1s
Test Suite (windows-latest, stable, 0.11.0)	18m 5s
Test Suite (macos-15, nightly, 0.15.2)	17m 50s
Test Suite (windows-latest, nightly, 0.11.0)	20m 29s
Test Suite (windows-latest, nightly, master)	19m 57s
Test Suite (windows-latest, 1.88.0, 0.15.2)	18m 57s
Test Suite (windows-latest, 1.88.0, 0.11.0)	18m 56s
Test Suite (macos-15, nightly, 0.11.0)	14m 10s
Test Suite (ubuntu-latest, stable, 0.11.0)	16m 56s
Test Suite (macos-15, 1.88.0, 0.15.2)	16m 30s
Test Suite (macos-15, 1.88.0, 0.11.0)	14m 57s
Test Suite (windows-latest, stable, master)	19m 59s
Test Suite (windows-latest, stable, 0.15.2)	20m 3s
Test Suite (ubuntu-latest, nightly, master)	19m 21s
Test Suite (windows-latest, nightly, 0.15.2)	20m 2s
	7h 29m 57s

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