Rust

Update Protocol/unsafe_protocol docs #6306

Job	Run time
Integration Test (AArch64)	1m 24s
Build (stable MSRV)	38s
Integration Test (x86_64)	1m 34s
Integration Test (IA-32)	1m 17s
Integration Test (x86_64 Windows)	2m 59s
Build (uefi-raw MSRV)	30s
Unit + Doc Tests	43s
Lints	43s
Build Standard Binary (nightly)	31s
Test Coverage	41s
Build (feature permutations)	3m 13s
Nightly (build, test, doc)	2m 28s
Unit + Doc Tests (Miri)	1m 35s
	18m 16s

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