Added bugfix to release notes.
Added bugfix to release notes.

lilulu/openmc,kellyrowland/openmc,mit-crpg/openmc,samuelshaner/openmc,wbinventor/openmc,smharper/openmc,johnnyliu27/openmc,mit-crpg/openmc,walshjon/openmc,mit-crpg/openmc,mjlong/openmc,liangjg/openmc,bhermanmit/openmc,kellyrowland/openmc,smharper/openmc,nhorelik/openmc,shenqicang/openmc,sxds/opemmc,lilulu/openmc,amandalund/openmc,johnnyliu27/openmc,liangjg/openmc,mjlong/openmc,keadyk/openmc_mg_prepush,keadyk/openmc_mg_prepush,bhermanmit/openmc,shikhar413/openmc,paulromano/openmc,nhorelik/openmc,paulromano/openmc,shikhar413/openmc,wbinventor/openmc,sxds/opemmc,samuelshaner/openmc,amandalund/openmc,smharper/openmc,shikhar413/openmc,lilulu/openmc,bhermanmit/cdash,wbinventor/openmc,johnnyliu27/openmc,walshjon/openmc,walshjon/openmc,wbinventor/openmc,amandalund/openmc,mit-crpg/openmc,samuelshaner/openmc,liangjg/openmc,johnnyliu27/openmc,smharper/openmc,walshjon/openmc,paulromano/openmc,amandalund/openmc,shikhar413/openmc,liangjg/openmc,keadyk/openmc_mg_prepush,samuelshaner/openmc,paulromano/openmc,shenqicang/openmc