Thanks, when you create a new devlog, you can brand it as a “Major Update”. But apparently, it needs to be approved by mods.
This might be so. But this would also be quite unfair to the developers that simply update their games regularly without logging about it - if this were the only way to have an update be considered a major update. Even more so as devlogs have their own place to shine and be found, regardless if there is any associated refreshment of the recent status.