The project name is based on the Unity version. If you check there is a release with exactly that name, which is the latest LTS release.
Edit:
It was the latest release (Unity 2019.4.5f1) 1 week earlier to the Jam, when we met up for the first time to chat and decide which Engine and Version to use.
So: 2D(template) + MainProject(no name for the game yet, and this is not a test project) + Unity LTS Version at the time (Approx).
Sorry for the confusion, again.