Some of these links were actually broken, since they expect to find designs under the `packages/` directory in the current `develop` branch. Other links were technically okay, since they link to old commits, but updating those links may still help to reduce confusion.
Also fix a reference to `packages/unice` in a `netlify.toml` file. (Untested, but I don't think this is an actual Netlify configuration.)
0becd057b2