Fix MetadataFactory header
Similar change to https://code.usgs.gov/ghsc/geomag/geomag-plots/-/merge_requests/365
Likely caused by FastAPI version update in !103 (merged)
Fixes bug where 422 error is given for PUT/POST requests
Similar change to https://code.usgs.gov/ghsc/geomag/geomag-plots/-/merge_requests/365
Likely caused by FastAPI version update in !103 (merged)
Fixes bug where 422 error is given for PUT/POST requests