Merge in CASA/casa6 from CAS-13889 to master
* commit 'ec7f552d739489b1f1357462d5d53978efd006fc':
CAS-13889 update casaplotms version in build.conf
CAS-13889 update casaplotms version
CAS-13889 update reference to casaplotms wheel
CAS-13889 update casaplotms version
CAS-13889 update reference to casaplotms