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.

src/App.tsx

@@ -33,7 +33,7 @@ import './App.css'
  * AGPL section 13: anyone playing this over a network is entitled to the
  * source of the version they are playing, so the offer sits on every screen.
  */
-const SOURCE_URL = 'https://github.com/Coffey-Labs/wumpus'
+const SOURCE_URL = 'https://github.com/jcoffey-dev/wumpus'
 
 /**
  * The way back out.

src/game/highscores.ts

@@ -5,7 +5,7 @@
  * before putting it on screen.
  *
  * The service is shared with the other games on the site rather than being one
- * of ours -- see https://github.com/Coffey-Labs/games-scores. That is why
+ * of ours -- see https://github.com/jcoffey-dev/games-scores. That is why
  * every call names the game. Nothing else about it leaks in here: the rows
  * come back in this game's own field names, so this file would be identical if
  * the board were ours alone.