Replace header and footer links to wiki with links to coda

[Aprillion]

Let's replace wiki links from header and footer:

• Get Involved is publicly accessible on Coda => https://coda.io/d/AI-Safety-Info-Dashboard_dfau7sl2hmG/Get-involved-with-AI-Safety-Info_susRF
• About => ?
• Join Discord => ?
• Copyrights => ?

[Aprillion]

Specification from plex on Discord:

      <footer>
        <a href="https://discord.gg/vjFSCDyMCy">Join Discord</a>
        <a href="https://get_involved.aisafety.info/">About / Get Involved</a>
        <a href="https://dashboard.aisafety.info/">Dashboard</a>
        <a href="https://github.com/StampyAI/stampy-ui">Help Code</a>
        <a href="https://docs.google.com/forms/d/e/1FAIpQLSdT--8lx5F2pAZoRPPkDusA7vUTvKTVnNiAb9U5cqnohDhzHA/viewform">
          Feedback
        </a>
        <a href="https://coda.io/d/AI-Safety-Info-Dashboard_dfau7sl2hmG/Copyright_su79L#_luPMa">@ 2022 stampy.ai</a>
      </footer>

With note: Not settled on using the redirects I set up but let's use that for now.

[plexish]

Specification from plex on Discord:

      <footer>
        <a href="https://discord.gg/vjFSCDyMCy">Join Discord</a>
        <a href="https://get_involved.aisafety.info/">About / Get Involved</a>
        <a href="https://dashboard.aisafety.info/">Dashboard</a>
        <a href="https://github.com/StampyAI/stampy-ui">Help Code</a>
        <a href="https://docs.google.com/forms/d/e/1FAIpQLSdT--8lx5F2pAZoRPPkDusA7vUTvKTVnNiAb9U5cqnohDhzHA/viewform">
          Feedback
        </a>
        <a href="https://coda.io/d/AI-Safety-Info-Dashboard_dfau7sl2hmG/Copyright_su79L#_luPMa">@ 2022 stampy.ai</a>
      </footer>

With note: Not settled on using the redirects I set up but let's use that for now.

Had to drop dashboard.aisafety.info to stay within the page rules limits, so that'll need to be removed or replaced with one on a different domain, but otherwise this is done.

[Aprillion]

Updated dashboard link in future branch too -> https://github.com/StampyAI/stampy-ui/pull/143