news: add news for v0.9.2
news: add news for v0.9.2

ajeddeloh/ignition,dgonyeo/ignition,AlexNPavel/ignition,ajeddeloh/ignition,AlexNPavel/ignition,dgonyeo/ignition,coreos/ignition,higebu/ignition,coreos/ignition,ajeddeloh/ignition,AlexNPavel/ignition,higebu/ignition,dgonyeo/ignition,higebu/ignition,coreos/ignition