[Wiki] Consistently announce lack of API changes in releases
[Wiki] Consistently announce lack of API changes in releases

Always use 'None.' in case there are no API changes.

Change-Id: I6ae76cc145648de52d30b04fdde3323831563f06

bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr