melange: update to 5.0.1 #5679

Job	Run time
nix-fmt-check	1m 39s
Native packages (macOS (macos-13), OCaml 5_1)	19m 27s
Native packages (Linux, OCaml 4_14)	4m 13s
Native packages (macOS (macos-13), OCaml 5_2)	17m 48s
arm64 packages (OCaml 4_14)	1m 34s
Native packages (Linux, OCaml 5_1)	4m 22s
Native packages (macOS (macos-13), OCaml 5_3)	20m 11s
musl packages (OCaml 4_14)	1m 33s
Native (Top-level) packages (ubuntu-latest)	1m 39s
Native packages (Linux, OCaml 5_2)	3m 37s
Native packages (macOS (macos-14), OCaml 4_14)	10m 13s
arm64 packages (OCaml 5_1)	1m 30s
Native packages (Linux, OCaml 5_3)	3m 50s
Native (Top-level) packages (macos-13)	4m 4s
Native packages (macOS (macos-14), OCaml 5_1)	11m 13s
musl packages (OCaml 5_1)	1m 42s
Native (Top-level) packages (macos-14)	2m 14s
Native packages (macOS (macos-14), OCaml 5_2)	9m 44s
arm64 packages (OCaml 5_2)	1m 44s
musl packages (OCaml 5_2)	1m 47s
arm64 packages (OCaml 5_3)	1m 50s
Native packages (macOS (macos-14), OCaml 5_3)	11m 43s
musl packages (OCaml 5_3)	1m 31s
	2h 19m 8s

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