Merge pull request openscd#886 from openscd/Update-copyright-notice

others and companies added to the copyright

Author: Sander3003

README.md

@@ -58,6 +58,6 @@ distributed under their [end user license agreement](CC-EULA.pdf).
 
 This project is licensed under the [Apache License 2.0](LICENSE.md).
 
-© 2020-2022 OMICRON electronics GmbH
+© 2020-2022 OMICRON electronics GmbH, Jakob Vogelsang, TransnetBW GmbH, Alliander N.V., and others
 
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