[pkg] Fix extra packages not installable
For instance `pip install -e ".[pyramid]"` should install the pyramid
dependencies. A typo caused all these extra packages to not be found by
pip.
Closes #16121322.
.. _authplugin_module:
:mod:`cubicweb.pyramid.authplugin`
----------------------------------
.. automodule:: cubicweb.pyramid.authplugin
.. autoclass:: DirectAuthentifier
:show-inheritance:
:members: