Fixed broken link in setup.md

[j9pino]

Fixed MyBinder link on line 53

[github-actions[bot]]

:ok: Pre-flight checks passed :smiley:

This pull request has been checked and contains no modified workflow files, spoofing, or invalid commits.

It should be safe to Approve and Run the workflows that need maintainer approval.

[bencomp]

This would fix #287 I believe.

[ostephens]

Closes #287

[bencomp]

Closes #287

I'm afraid these magic words only work to automatically close related issues when they are used in the initial pull request text. But I think you know this 👍