upgrade cohttp, yaml, patdiff #3727

Job	Run time
Native packages (Linux, OCaml 4_14)	12m 58s
nix-fmt-check	2m 9s
Native packages (Linux, OCaml 5_0)	16m 40s
Native packages (macOS, OCaml 4_14)	23m 15s
arm64 packages (OCaml 4_14)	3m 42s
Native packages (Linux, OCaml 5_1)	10m 46s
Native packages (macOS, OCaml 5_0)	23m 22s
musl packages (OCaml 4_14)	1m 58s
Native packages (macOS, OCaml 5_1)	26m 39s
arm64 packages (OCaml 5_0)	2m 19s
Native (Top-level) packages (ubuntu-latest)	40s
Native (Top-level) packages (macos-13)	1m 44s
musl packages (OCaml 5_0)	1m 27s
arm64 packages (OCaml 5_1)	2m 17s
musl packages (OCaml 5_1)	1m 17s
	2h 11m 13s

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