[MCCS-2108] Fix docs
It appears our docs have been failing to build for a while, this MR makes our docs build again.
See: https://readthedocs.org/projects/ska-telescope-ska-low-mccs-spshw/builds/24232304/ and : https://developer.skao.int/projects/ska-low-mccs-spshw/en/mccs-2108/