@olf is wrong, everybody must install each stop release
the links you attached are exact and correct
for others who are confused:
in short: the outdated device must be updated in this way: from STOP ( 4.4.0.72) to STOP (4.5.0.25) to STOP (4.6.0.15) and finally to recent release (5.0.0.55 or to the next stop in the line what will be released in the future) …complete version history is here: Releases | Sailfish OS Documentation each stop release is marked as bold
next stop version in line is also clearly described in release notes for example [Release notes] Sauna 4.6.0.11 :
Stop release
4.6.0.15 is a stop-release.