fix DOI link to burnup benchmark paper
fix DOI link to burnup benchmark paper

wbinventor/openmc,liangjg/openmc,samuelshaner/openmc,amandalund/openmc,smharper/openmc,bhermanmit/openmc,johnnyliu27/openmc,amandalund/openmc,mit-crpg/openmc,wbinventor/openmc,samuelshaner/openmc,wbinventor/openmc,paulromano/openmc,johnnyliu27/openmc,samuelshaner/openmc,mit-crpg/openmc,wbinventor/openmc,smharper/openmc,walshjon/openmc,walshjon/openmc,mit-crpg/openmc,shikhar413/openmc,walshjon/openmc,walshjon/openmc,johnnyliu27/openmc,paulromano/openmc,shikhar413/openmc,mit-crpg/openmc,amandalund/openmc,paulromano/openmc,shikhar413/openmc,amandalund/openmc,bhermanmit/openmc,smharper/openmc,johnnyliu27/openmc,paulromano/openmc,samuelshaner/openmc,liangjg/openmc,liangjg/openmc,liangjg/openmc,shikhar413/openmc,smharper/openmc