QgsProcessingAlgorithm Help is broken

Issue #528 resolved
Benjamin Jakimow created an issue

The parameterization dialog of the EnMAPBox QgsProcessingAlgorithms offers a help button which opens https://bitbucket.org/hu-geomatics/enmap-box-geoalgorithmsprovider/src/master/ (which seems to be outdated)

It would be good if the button
a) opens a real help / documentation page, e.g. which describes the specific algorithm, or
b) if no help is available / require, does not become visible at all.