RelVals: fix input dataset for 1308.0 BeamHalo_13

Signed-off-by: David Abdurachmanov <David.Abdurachmanov@cern.ch>
Merge pull request #2107 from davidlt/fix-62x-relval-BeamHalo_13-input

RelVals: fix input dataset for 1308.0 BeamHalo_13