Update vscode-styled-components publisher

[alexojegu]

• 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 OpenVSX (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

Remove old published by Julien Poissonnier (jpoissonnier) and add new published by Styled Components (styled-components).

See the extension on the Microsoft marketplace and issues as this in the vscode-styled-components repository.

Screenshot from the official repository:

[filiptronicek]

Thanks for the contribution, @alexojegu!
We have addressed this change in #565, so I will close this PR.