There is a new Civi release about every fortnight (or even less) (currently 5.18.1).
Updating one's configuration at every release is painful and risky (you may have regressions) ; but it can also be very useful (bug fixes, ans enhancements).
So, it would be very useful to know what changes are brought by a new release.
... which is the usual purpose of Release Notes.
I could not find such assciated release notes. Are there any ? If yes, where can we find them ?