Sorry, coming to this a little late. I tend to agree with Elad that we might be better off not even having 2.0/2.1, and I'll go further that we should consider only listing main/latest/possibly n-1(e.g. 2.3.2).
I'm also concerned only showing the latest in every minor may imply those are all getting bugfixes, while in fact only 2.3.x is. Plus, even if we tell people to upgrade to the latest 2.2.x version (2.2.5 from 2.2.2, for example) before reporting, the first thing we are going to ask in the issue is "what about 2.3.3/main?". Another option is a free test field instead, though this doesn't provide the subtle hint you are after. If we don't make it a free text field and don't enumerate all the versions, we almost certainly want an "other" option? I'd rather give them that escape hatch then have the wrong version in the easy to spot section and their real version hidden in a wall of text. I've opened this to take your change a bit further: https://github.com/apache/airflow/pull/25542
