pandeia data 1.6 required

[MartianColonist]

During an installation of PandExo from cloning this GitHub repository, we encountered an error when running 'run_test.py'. The error references a missing key for NIRSpec BOTS.

This issue appears to be caused by a mismatch between pandeia.engine==1.6 in setup.py and the pandeia reference data V1.5 linked to in the documentation. We fixed the error by updating the pandeia reference data from V1.5 to 1.6.

Please can you update the documentation to link to V1.6 of the pandeia reference data (https://stsci.app.box.com/v/pandeia-refdata-v1p6)?

Thanks!