Dune 3.17.2 has vanished

https://github.com/rocq-community/docker-base/blob/caa184b7d75dc27374bfc11ed82547d960127e54/images.yml#L9

## Upstream
- [x] ocaml/opam-repository#27977
- [ ] ocaml/opam-repository#28065

## Downstream
- [ ] rocq-community/docker-coq#81
- [x] rocq-community/templates#137
- [x] QuickChick/QuickChick#407