site-admin repos page: use Code for errors instead of TerminalLine

Created by: mrnugget

The <TerminalLine /> component renders a <li /> and needs to be inside a <Terminal /> which looks a bit weird here and throws an error in dev mode, so I'm using <Code> instead.

Test plan

• Tested manually

App preview:

• Web
• Storybook

Check out the client app preview documentation to learn more.