Changelog bump for 0.17.0ubuntu3
Changelog bump for 0.17.0ubuntu3

mrpau/installers,benjaoming/installers,learningequality/ka-lite-installers,learningequality/ka-lite-installers,benjaoming/installers,learningequality/ka-lite-installers,learningequality/installers,mrpau/installers,learningequality/ka-lite-installers,mrpau/installers,learningequality/installers,benjaoming/installers,learningequality/installers,learningequality/installers,mrpau/installers,benjaoming/installers