ETABS_Toolkit: Modal Dynamics outputs erroneous results.

#### Description:

Results output for MopdalDynamics does not give appropriate results

#### Steps to reproduce:

Pull ModalDynamics

#### Test file(s):

https://burohappold.sharepoint.com/:f:/s/BHoM/EszNjShmWNFJpiMmQ1EdM7ABAa3i7rfMe8oa54uHFtbwxg?e=MmDatl

Start by pulling the ModalDynamics workflow in the ETABS_Toolkit and reviewing the linked test files. Compare the reported output with the expected modal-dynamics results and identify a reproducible case; done means the output is corrected and validated against those files.

Written by the indexing model from the issue text.