Extend FAQ with answer of how to create a new release note
Extend FAQ with answer of how to create a new release note

The question was raised in the #openstack-ironic IRC channel

Change-Id: I7d72adc96d606e6062930fe3c9e653ba369e621b

ionutbalutoiu/ironic,SauloAislan/ironic,devananda/ironic,openstack/ironic,NaohiroTamura/ironic,ionutbalutoiu/ironic,openstack/ironic,NaohiroTamura/ironic,dims/ironic,bacaldwell/ironic,bacaldwell/ironic,pshchelo/ironic,SauloAislan/ironic,pshchelo/ironic,dims/ironic