Fix possible accessibility issue in V3.0 alert

[kognise]

On the Pattern Lab website I saw the alert at the top but did not know that it was a clickable link until I accidentally clicked on it.

I added a simple "Click here to" to it's contents.

Another possible workaround would be to apply text-decoration: underline; even when the link isn't being hovered, but in my opinion that doesn't look as good.