My question is are there any upgrade notes for 6.7.7 or will it be sufficient to move to 6.7.7 LTS just by looking at the upgrade notes in the URL above?
Great question! The upgrade notes are intended to give you the big things you need to know before adopting a version & generally there just aren’t any big things you need to know for a point version. 6.7.5 was very much a exception. None of the other point releases have upgrade notes, only Jira release notes listing the bugs they fixed. (In case you’re interested.)