[ENHANCEMENT] README.md VS Code marketplace badge "rate limited by upstream service"

[0xNikilite]

Problem (one or two sentences)

sometimes the README.md VS Code marketplace badge gives this error: "rate limited by upstream service"

Context (who is affected and when)

everyone when reading the README.md

Desired behavior (conceptual, not technical)

should display the version number of the VS Code Marketplace extension.

Constraints / preferences (optional)

No response

Request checklist

• I've searched existing Issues and Discussions for duplicates
• This describes a specific problem with clear context and impact

Roo Code Task Links (optional)

No response

Acceptance criteria (optional)

No response

Proposed approach (optional)

No response

Trade-offs / risks (optional)

No response

[roomote]

I'm exploring a potential fix for the VS Code marketplace badge rate limiting issue and will open a PR to share progress.

[roomote]

I've opened PR #8810 to fix the VS Code marketplace badge rate limiting issue.

The fix updates the badge URL from the deprecated visual-studio-marketplace endpoint to the correct vscode-marketplace endpoint on shields.io, which is designed to avoid rate limiting.

PR link: #8810