systemtype declared as required in the doc but not in jsonschema of geojson encoding

[ricardogsilva]

According to https://docs.ogc.org/is/23-001/23-001.html#clause-system-resource Table 4 - System Attributes, a System's systemType is a required property.

This property is mapped to properties/featureType on https://docs.ogc.org/is/23-001/23-001.html#clause-encoding-geojson Table 40 - GeoJSON Encoding of System Attributes.

However, in the system.json JSON Schema file at

ogcapi-connected-systems/api/part1/openapi/schemas/geojson/system.json

Line 6 in 8e03b23

"properties": {

the featureType property is not marked as being a required property.