Separating the copy install button and source link

A user brought to my attention how "copy" and "source" look like the same button and they misclicked when trying to copy on https://tsloughter.github.io/beamup/

I see it is the same on the front page of https://opensource.axo.dev/oranda/

But when looking to see if this was already an issue I found the original PR and the screenshot showed them visibly separated, https://github.com/axodotdev/oranda/pull/170

Seeing that, I assumed it was a decision made to remove the separation and so I wouldn't try adding it back and PR'ing until I opened an issue to ask about it.