[wiki] update release notes for 0.2.3
[wiki] update release notes for 0.2.3

Change-Id: I589cc43c876ebca8180026c3734b39c6b9586e24

bmwcarit/smrf,bmwcarit/smrf,bmwcarit/smrf,bmwcarit/smrf,bmwcarit/smrf,bmwcarit/smrf