Website links in writer portal are broken if they don't have the protocol.

If a website link in the writer's details doesn't start with `http://` or `https://`, the link is broken on the writer portal. For example, see the website link in https://portal.draft.dev/writers/recyXbROI5JMWEOtv . This is because we are outputting the link straight to an `<a>` tag, so in the absence of a protocol, the browser treats the URL as a relative URL and breaks.