doc: Update annotation code sample.
doc: Update annotation code sample.

a-richardson/capnproto,vladon/capnproto,rcrowder/capnproto,maurer/capnproto,ocdtrekkie/capnproto,bryce-gibson/capnproto,mrdomino/capnproto,MarPiRK/capnproto,nagyistoce/capnproto,bsn069/capnproto,hntrmrrs/capnproto,mrdomino/capnproto,hntrmrrs/capnproto,maurer/capnproto,Fraser999/capnproto,kamalmarhubi/capnproto,ligzy/capnproto,vladon/capnproto,mologie/capnproto,artillery/capnproto,pjulien/capnproto,MarPiRK/capnproto,nagyistoce/capnproto,bryce-gibson/capnproto,rcrowder/capnproto,ocdtrekkie/capnproto,zarvox/capnproto,martindale/capnproto,hntrmrrs/capnproto,johnkdoe/capnproto,a-richardson/capnproto,bsn069/capnproto,artillery/capnproto,rcrowder/capnproto,jparyani/capnproto,zarvox/capnproto,martindale/capnproto,bsn069/capnproto,jparyani/capnproto,a-richardson/capnproto,nagyistoce/capnproto,joliss/capnproto,ligzy/capnproto,modulexcite/capnproto,martindale/capnproto,joliss/capnproto,modulexcite/capnproto,maurer/capnproto,geofft/capnproto,joliss/capnproto,jparyani/capnproto,Fraser999/capnproto,vladon/capnproto,mologie/capnproto,mologie/capnproto,pjulien/capnproto,mrdomino/capnproto,modulexcite/capnproto,kamalmarhubi/capnproto,bryce-gibson/capnproto,artillery/capnproto,johnkdoe/capnproto,khklau/capnproto,geofft/capnproto,ligzy/capnproto,khklau/capnproto,ocdtrekkie/capnproto,kamalmarhubi/capnproto,khklau/capnproto,MarPiRK/capnproto,geofft/capnproto,johnkdoe/capnproto,Fraser999/capnproto,pjulien/capnproto,zarvox/capnproto