Fix for plone/cookiecutter-zope-instance 2.x: naming zcml variables

[ksuess]

See https://github.com/plone/cookiecutter-zope-instance?tab=readme-ov-file#upgrading

Fix needed. Otherwise the build (make build-backend) fails.

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[stevepiercy]

Thank you! Will merge right away.

[stevepiercy]

I'll fix the broken links in another PR.

[jensens]

No idea how its done best, but we need version-management for cookiecutters.
The call supports option cookiecutter --checkout=1.0.1 ... for those who do not want the new 2.0.0 major release.

[stevepiercy]

@jensens are you talking about adding support for that call in the cookiecutter itself or in documentation, or both?

We could add a note to the documentation under Install Plone 6, but the assumption is that the user is creating a new project and should use the latest supported versions of everything. I think adding a note here would add confusion.

But in management of existing projects, we have a note to see the readme for Configuration with cookiecutter-zope-instance. Would that be a good place to add a note about specifying the version of this cookiecutter?

Please let me know. Thank you!

[jensens]

We should change cookiecutter-plone-starter to pin it and update the Makefile snippet accordingly.

[davisagli]

@jensens I added an issue over there: collective/cookiecutter-plone-starter#123