ci: Fix llvm install on release-plz workflow (again) (#1884) #3344

Job	Run time
Check for changes	5s
Build benchmarks 🏋️	2m 39s
tests (Rust nightly, coverage)	2m 53s
check	1m 48s
tests (Rust 1.75)	2m 42s
tests (Rust beta)	2m 34s
tests (Rust stable, all features)	2m 42s
tests (Rust stable, no features)	2m 13s
Check standard extensions	3s
Required checks 🦀	1s
	17m 40s

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