Some third party entries in your sources.list were disabled. You can re-enable them after the upgrade with the 'software-properties' tool or your package manager.
Zure 'sources.list' fitxategiko hirugarrengoen sarrera batzuk ezgaitu dira. Berriro gaitu ditzakezu bertsio-berritzearen ondoren, 'software-properties' tresna edo zure pakete-kudeatzailea erabiliz.