Humble build is broken due to no docker container #204
Description
It looks like PX4 doesn't currently create a px4io/px4-dev-ros2-humble container, so the CI builds all error when trying to pull the image. It would be straight-forward to remove humble from the build matrix, but I don't see why PX4 wouldn't have a humble container (so maybe I should just update PX4-containers or make a ticket there).
Also, is there a reason to keep the TAG for containers on 2021-05-31? That was a while ago.