ContentMediaType documentation is missing in https://github.com/SAP/abap-file-formats/blob/main/docs/json.md#writing-json-schema-with-abap-types

[marcushoepfner]

A chapter for the json property contentMediaType is missing in the document https://github.com/SAP/abap-file-formats/blob/main/docs/json.md#writing-json-schema-with-abap-types