Log Message:
devel/ocaml-dune: revbump for the `which' fix (pkg-config not found).

dholland@ had added this patch only to devel/ocaml-dune-configurator
and revbumped that:

https://mail-index.netbsd.org/pkgsrc-changes/2024/11/30/msg311600.html

Then gdt@ moved the patches to devel/ocaml-dune to merge the patchdir
and distinfo, since the half-merged state was causing trouble, but
didn't revbump devel/ocaml-dune:

https://mail-index.netbsd.org/pkgsrc-changes/2024/12/06/msg311977.html

Builds that have been incremental since before 2024-12-06 may still
have a broken devel/ocaml-dune and no reason to rebuild it until we
revbump it.