add conda documentation build?
@duncanmmacleod @adam-mercer @karl-wette what would you think about adding a second documentation build job using conda-forge dependencies? The currently only such job seems to be running the igwn/lalsuite-dev:buster
docker image, which currently has doxygen 1.8.13, while conda-forge is already at 1.9.1. I can imagine it will often be a step ahead like this in the future, so such an extra job could help catch things like #570 (closed) early, and shouldn't take too much runtime.