doc: Avoid title case and make FAQs all questions #29816

Job	Run time
Coq 8.16.1	7m 2s
Build microbenchmarks	2m 27s
Create local opam switch (macos-latest, 5)	7m 31s
Build (macos-latest, 5.1.x)	13m 32s
Create local opam switch (macos-latest, 4.14)	7m 27s
Build (ubuntu-latest, 5.1.x)	8m 29s
Documentation	1m 1s
Create local opam switch (ubuntu-latest, 5)	4m 49s
Build (ocaml-variants.5.4.0+trunk, ubuntu-latest, true)	1m 27s
Format	1m 3s
Create local opam switch (ubuntu-latest, 4.14)	4m 48s
Build (4.14.x, ubuntu-latest, true)	1m 24s
Build monorepo benchmark docker image	1m 40s
Build (4.14.x, macos-latest, true)	2m 35s
Nix (macos-latest)	2m 31s
Build (5.1.x, macos-13, true)	5m 32s
Wasm_of_ocaml	10m 28s
Nix (ubuntu-latest)	51s
Build (ocaml-base-compiler.4.14.2,system-msvc, windows-latest)	14m 41s
Build (ocaml-base-compiler.5.1.1,system-mingw, windows-latest)	8m 25s
Build (4.08.x, ubuntu-latest, true)	1m 26s
Build (4.04.x, ubuntu-latest, true, true)	4m 28s
Build (4.02.x, ubuntu-latest, true)	4m 2s
	1h 57m 39s

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