Several docs-related dependencies in Parsons are pretty far behind their latest project versions, and began causing CI failures related to Sphinx. This bumps Sphinx up to the latest 5.x version before introduction of 6.0, bumps sphinx-rtd-theme correspondingly, and attempts to upgrade myst-parser as well. If build steps fail, we will likely need to be a little less aggressive with the version number leaps of the latter two packages.
Several docs-related dependencies in Parsons are pretty far behind their latest project versions, and began causing CI failures related to Sphinx. This bumps Sphinx up to the latest 5.x version before introduction of 6.0, bumps sphinx-rtd-theme correspondingly, and attempts to upgrade myst-parser as well. If build steps fail, we will likely need to be a little less aggressive with the version number leaps of the latter two packages.