Point the repository URLs at their new owner

These moved from the Coffey-Labs org to jcoffey-dev, where they belong.
GitHub redirects a transferred repository, so nothing was broken by
leaving them -- but a source link that lands via a redirect is still
naming an owner that no longer holds the code, and the redirect only
lasts as long as nobody creates a repository of the same name in the
old place.

Only the seven repositories that actually moved are rewritten. Every
other Coffey-Labs URL is left alone: ihasmail, cairnobs and the rest
are still there.

index.html

@@ -136,7 +136,7 @@
         and never told which room. It needs JavaScript to play.
       </p>
       <p><a href="https://games.jcoffey.dev/">The rest of the games</a></p>
-      <p><a href="https://github.com/Coffey-Labs/wumpus">Source, AGPL-3.0-or-later</a></p>
+      <p><a href="https://github.com/jcoffey-dev/wumpus">Source, AGPL-3.0-or-later</a></p>
     </noscript>
     <script type="module" src="/src/main.tsx"></script>
   </body>