Bump KF5 dependency to 5.102 since KNS backend requires it.
KNS backend now depends on kf5 knewstuff that hasn't yet been released, but will be in kf5 5.102 so bump dependency to that.
KNS backend now depends on kf5 knewstuff that hasn't yet been released, but will be in kf5 5.102 so bump dependency to that.