Sections instead of collapsed headers in doc nav #7

Job	Run time
Format	13s
Audit dependencies	52s
Build and test (stable, ubuntu-latest, x86_64-unknown-linux-gnu)	1m 22s
Clippy (x86_64-unknown-linux-gnu, false, true)	1m 51s
Build and test (beta, ubuntu-latest, x86_64-unknown-linux-gnu)	1m 45s
Clippy (armv7-unknown-linux-gnueabihf, true, false, -target arm-linux-gnueabihf -mcpu=generic+v7a...	1m 14s
Smoke-test fuzzing targets	4m 57s
Validate man pages	10s
Build and test (1.66.0, ubuntu-latest, x86_64-unknown-linux-gnu)	1m 36s
Smoke-test fuzzing targets (--features ntpv5)	2m 47s
Clippy (x86_64-unknown-linux-musl, true, false, -target x86_64-linux-musl)	1m 52s
Build and test (stable, ubuntu-latest, x86_64-unknown-linux-musl)	1m 31s
Clippy (x86_64-apple-darwin, true, false, -target x86_64-macos-gnu -g)	1m 19s
Build and test (stable, macos-latest, x86_64-apple-darwin)	1m 47s
Check unused dependencies	1m 48s
Build and test (stable, ubuntu-latest, --features ntpv5, x86_64-unknown-linux-gnu)	1m 28s
Validate configs	1m 10s
Build and test (1.66.0, ubuntu-latest, --features ntpv5, x86_64-unknown-linux-gnu)	2m 14s
Build and test (stable, ubuntu-latest, --features ntpv5, x86_64-unknown-linux-musl)	1m 28s
Build and test (stable, macos-latest, --features ntpv5, x86_64-apple-darwin)	1m 14s
	32m 38s

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