Fix docgram's dune file following #12085.

[Zimmi48]

Kind: infrastructure.

[ejgallego]

Pretty strange failures, let's merge anyways as they do look unrelated.

@coqbot: merge now

p.s: I'm sure you already know @Zimmi48 but it'd be nice if we could restore the 1-click setting from details to gitlab's pipeline , if possible indeed now that coqbot is GH app.

[Zimmi48]

It's related to the use of the "Checks" API and tab rather than just the fact that coqbot is a GH app, although the latter was a prerequisite (cf. https://coq.zulipchat.com/#narrow/stream/243318-coqbot-devs.20.26.20users/topic/Checks). It's not something that we can control: the indirection is imposed by GitHub as we could see already from using Azure pipelines. However, by adding much more information to this Checks tab, I'm hoping to make it much more convenient and to reduce the need to follow the link to GitLab (another thing to do is to support restarting a failed job directly from GitHub, which would avoid requiring contributors to also register and request access on GitLab).

[ejgallego]

Yeah, I read about the plan, which makes sense, but indeed the direct link was very convenient, users like me do really want to jump to gitlab. Github is becoming super clicky as of late.