Bugfix in 801788 JOs, m_Wprime should have been 6 TeV

There was a typo in the JobOptions for signal sample 801788 used for the analysis EXOT-2022-18 (https://atlas-glance.cern.ch/atlas/analysis/analyses/details.php?id=7699), the m_Wprime in these JobOptions should have been 6 TeV rather than 4 TeV.

This MR just makes this change, which we need to do before we can request a new production of this signal point.

Many thanks! Matt o.b.o. the EXOT-2022-18 team