CI: fix with workaround

[pjaap]

First observation: Removing Makie resolves the problem

[pjaap]

second observation: Importing pyplot BEFORE CairoMakie resolves the problem

[pjaap]

MakieOrg/Makie.jl#3115 maybe related?

[pjaap]

This seems to do the job right now. What I understood, from MakieOrg/Makie.jl#3115:

• It seems like a FreeType C-lib problem, both CairoMakie and PyPlot access it
• Independent of the version of CairoMakie and Cairo_jll (tried both)
• I guess the problem may be in the matplotlib downloaded by Conda (was there an update?)
• or a dependency of matplotlib ...

So how to proceed? @j-fu

[pjaap]

Yes, in the previous runs matplotlib-3.10.9 was used, whereas we have now a failure with matplotlib-3.11.0

[j-fu]

Weird. As this seems to make github CI happy I would merge this in order to be able to move
on. May be create an issue to keep an eye on the problem.

The bug is clearly not in our realm, we cannot do much of this.