Add missing README documentation from recent commits #283

Job	Run time
Build Channels DragonFlyBSD (stable)	3m 47s
Build Channels FreeBSD (stable)	2m 48s
Build Channels Linux (stable)	39s
Build Channels FreeBSD (1.70.0)	3m 12s
Build Channels macOS (stable, macos-14)	25s
Build Channels NetBSD (stable)	3m 30s
Build Channels macOS (1.70.0, macos-14)	35s
Build Channels NetBSD (1.70.0)	4m 3s
Build Channels OpenBSD (stable)	4m 8s
Build Channels Windows (stable, x86_64-pc-windows-msvc)	2m 29s
Build Channels Windows (1.70.0, x86_64-pc-windows-msvc)	1m 23s
Check #[cfg]s	14s
Style check	20s
Build Channels Linux (1.70.0)	45s
success	1s
	28m 19s

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