Nightly cookbook build is broken
Description
Nightly build of the cookbook (develop branch) is not available anymore in 'latest':
https://www.orfeo-toolbox.org/packages/nightly/latest/
Build script should probably be updated after recent change of the way the documentation is built (in the ob build tree)
Steps to reproduce
Describe as precisely as possible how to reproduce the bug. Try to isolate a minimal number of steps. Also describe reproducibility (always, random ...).
Configuration information
OS, OTB version or tag, information related to build (binaries, superbuild, system libs ...)