Got an update notice but no changelog

GOG has changed the version number of the game from "gog-23" to "1.0.0 Hotfix". This is not the first game for which I noticed a change from GOG's version number to the official version number. I could imagine that they are in the process of changing the version numbers in this way for the whole catalogue. Could just be coincidence however.

Here you can find some details about the update:
https://gogdb.yepoleb.me/product/1207658848#changelog

While the actual installer was also changed I doubt that there has been an update to the game itself. This would explain the absence of a changelog entry.