Oh, hi! Are you asking because we've started cutting pre-releases? 😛
The pre-releases are marked in such a way that it should be easy (well, easier to distinguish)... they have an orange label in GitHub, and they always have a dash in the version number.
For example, while v1.13.4 is not out yet, v1.13.4-0, v1.13.4-1, v1.13.4-2, and v1.13.4-3 are, but they are all pre-releases and can be ignored.
If you're being notified via email from GitHub, it will also contain the word "Pre-release" in the title, and so you can ignore it: [NodeBB/NodeBB] Pre-release v1.13.4-3 - v1.13.4-3
Hope that helps!