Add missing news about disk conversion
Add missing news about disk conversion

In the beta release, the mention of the disk conversion feature was
omitted by accident. This patch fixes that.

Signed-off-by: Hrvoje Ribicic <be5828fca31f89218048bec4189e30a581aa65da@google.com>
Reviewed-by: Helga Velroyen <2d0126b1ec6f9ec5cbec4a7012aa14faeaef10f5@google.com>

yiannist/ganeti,dimara/ganeti,leshchevds/ganeti,onponomarev/ganeti,mbakke/ganeti,grnet/snf-ganeti,ganeti/ganeti,ganeti/ganeti,andir/ganeti,mbakke/ganeti,bitemyapp/ganeti,dimara/ganeti,yiannist/ganeti,andir/ganeti,bitemyapp/ganeti,ganeti/ganeti,onponomarev/ganeti,yiannist/ganeti,mbakke/ganeti,grnet/snf-ganeti,leshchevds/ganeti,andir/ganeti,leshchevds/ganeti