[release] Update parent after release xwiki-platform-8.0-milestone-2
[release] Update parent after release xwiki-platform-8.0-milestone-2

xwiki/xwiki-platform,xwiki/xwiki-platform,pbondoer/xwiki-platform,xwiki/xwiki-platform,pbondoer/xwiki-platform,pbondoer/xwiki-platform,pbondoer/xwiki-platform,pbondoer/xwiki-platform,xwiki/xwiki-platform,xwiki/xwiki-platform