Fixed repo name in build_documentation. [skip ci]
Fixed repo name in build_documentation. [skip ci]

nicola-giuliani/dealii-sak,asartori86/dealii-sak,asartori86/dealii-sak,mathLab/deal2lkit,nicola-giuliani/dealii-sak,mathLab/deal2lkit,asartori86/deal2lkit,asartori86/deal2lkit