docs: fix dita syntax error
docs: fix dita syntax error

greenplum-db/gpdb,yuanzhao/gpdb,edespino/gpdb,yuanzhao/gpdb,yuanzhao/gpdb,edespino/gpdb,lisakowen/gpdb,50wu/gpdb,edespino/gpdb,edespino/gpdb,Chibin/gpdb,ashwinstar/gpdb,lisakowen/gpdb,ashwinstar/gpdb,Chibin/gpdb,xinzweb/gpdb,greenplum-db/gpdb,xinzweb/gpdb,greenplum-db/gpdb,jmcatamney/gpdb,xinzweb/gpdb,50wu/gpdb,greenplum-db/gpdb,50wu/gpdb,jmcatamney/gpdb,jmcatamney/gpdb,edespino/gpdb,yuanzhao/gpdb,xinzweb/gpdb,lisakowen/gpdb,adam8157/gpdb,adam8157/gpdb,ashwinstar/gpdb,50wu/gpdb,Chibin/gpdb,ashwinstar/gpdb,Chibin/gpdb,lisakowen/gpdb,adam8157/gpdb,adam8157/gpdb,jmcatamney/gpdb,50wu/gpdb,Chibin/gpdb,Chibin/gpdb,yuanzhao/gpdb,ashwinstar/gpdb,greenplum-db/gpdb,lisakowen/gpdb,ashwinstar/gpdb,adam8157/gpdb,yuanzhao/gpdb,Chibin/gpdb,Chibin/gpdb,xinzweb/gpdb,ashwinstar/gpdb,greenplum-db/gpdb,ashwinstar/gpdb,xinzweb/gpdb,xinzweb/gpdb,jmcatamney/gpdb,edespino/gpdb,greenplum-db/gpdb,Chibin/gpdb,adam8157/gpdb,50wu/gpdb,edespino/gpdb,greenplum-db/gpdb,lisakowen/gpdb,jmcatamney/gpdb,lisakowen/gpdb,50wu/gpdb,yuanzhao/gpdb,lisakowen/gpdb,edespino/gpdb,adam8157/gpdb,xinzweb/gpdb,adam8157/gpdb,edespino/gpdb,edespino/gpdb,jmcatamney/gpdb,yuanzhao/gpdb,jmcatamney/gpdb,yuanzhao/gpdb,50wu/gpdb,Chibin/gpdb,yuanzhao/gpdb