Fix "Visit out map page" link

[kevinkace]

This CTA links to https://coverage.seattlecommunitynetwork.org/, I'm getting a DNS error when loading.

[tedm]

@kevinkace that exists now in the pre-svelte live page. Don't worry about this until the svelte rewrite happens. After this works, we can address iframes (or lack of) and dns issues like this one