qa/README.vm: add note about web page that describes expanding lvm for root fs
qa/README.vm: add note about web page that describes expanding lvm for root fs

adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp