bun: add coffeeispower as a maintainer

pkgs/development/web/bun/default.nix

···
       mit # bun core
       lgpl21Only # javascriptcore and webkit
     ];
-    maintainers = with maintainers; [ DAlperin jk thilobillerbeck cdmistman ];
+    maintainers = with maintainers; [ DAlperin jk thilobillerbeck cdmistman coffeeispower ];
     platforms = builtins.attrNames passthru.sources;
   };
 }