update folder(cHazard name to match new seismic-risk-model PR (cHazard_beta)

[wkhchow]

@tieganh PR from August (OpenDRR/seismic-risk-model#92) has changed some folder names (cHazard, CDamage to cHazard_beta, cDamage_beta).

I think it the add-data.sh needs a minor tweak to address that change (https://github.com/OpenDRR/opendrr-api/blob/master/python/add_data.sh#L794)

Right now since no plans to update or rerun PSRA I think this issue is minor until we are able to address it. Good thing with @drotheram and @anthonyfok work on breaking the add-data.sh apart so we can now just run psra/dsra separately.