v2.4.0

Most important additions and changes relate to the following topics:

• SKOS annotations: skos:closeMatch, skos:exactMatch, skos:relatedMatch
• change of sector concepts and introduction of new object properties for subsectors

A comprehensive list of additions, changes and deletions can be found at
https://github.com/OpenEnergyPlatform/ontology/blob/master/CHANGELOG.md#240---2024-07-01