chore: fix requirements so it navigates to docs

[kylecarbs]

This was navigating to the relative markdown file, which is confusing when some links go to the docs.

[github-actions]

✨ code-server docs for PR #5973 is ready! It will be updated on every commit.

• Host: https://coder.com/docs/code-server/cc66b26
• Last deploy status: success
• Commit: 19531b9
• Workflow status: https://github.com/coder/code-server/actions/runs/3933069699

[github-actions]

✨ code-server dev build published to npm for PR #5973!

• Last publish status: success
• Commit: 19531b9

To install in a local project, run:

npm install @coder/code-server-pr@5973

To install globally, run:

npm install -g @coder/code-server-pr@5973