Update cms-validated-runs.xml

Addressing https://github.com/cernopendata/opendata.cern.ch/issues/308 
Without a DOI until there's a discussion on how to handle these...
Note that `\\`  in `581` won't do anything special.  They will be displayed as any other regular characters. Is this OK? If we want to display newlines or something of the kind, the content should be formatted in HTML.