Update README.md

[kineticsquid]

I'm tidying up the wikis for openvsx and open-vsx.org and reconciling references in the readme.md files

• I have read the note above about PRs contributing or fixing extensions
• I have tried reaching out to the extension maintainers about publishing this extension to Open VSX (if not, please create an issue in the extension's repo using this template).
• This extension has an OSI-approved OSS license (we don't accept proprietary extensions in this repository)

Description

I'm tidying up the wikis for openvsx and open-vsx.org and reconciling references in the readme.md files

[filiptronicek]

Looks great, thanks!

[kineticsquid]

@filiptronicek Thanks, can you merge? I don't have write access.

[kineticsquid]

Thanks @filiptronicek!