Add/review crs for ssebopeta data

Add (or review for accuracy if it already exists) crs information to ssebopeta datasets, which likely have the same crs (but please check this):

• s3://mdmf/gdp/ssebopeta_yearly.zarr
• s3://mdmf/gdp/ssebopeta_monthly.zarr

They have the following THREDDS catalog entries, if that is helpful to have:

• https://cida.usgs.gov/thredds/catalog.html?dataset=cida.usgs.gov/ssebopeta/yearly
• https://cida.usgs.gov/thredds/catalog.html?dataset=cida.usgs.gov/ssebopeta/monthly