Upload extension to open-vsx.org

[mmailaender]

Could you please also upload that extension to open-vsx.org? So all people that are using a forked VScode version (e.g. Gitpod) can also install your extension 🙂

The steps needed are described here: https://github.com/eclipse/openvsx/wiki/Publishing-Extensions

There is also a GitHub Action: https://github.com/HaaLeo/publish-vscode-extension#readme