Fix a broken link in readme
Fix a broken link in readme

droolsjbpm/optaplanner,baldimir/optaplanner,tkobayas/optaplanner,tkobayas/optaplanner,baldimir/optaplanner,baldimir/optaplanner,droolsjbpm/optaplanner,droolsjbpm/optaplanner,baldimir/optaplanner,droolsjbpm/optaplanner,tkobayas/optaplanner,tkobayas/optaplanner