Send word: a way to reach the keeper

The about panel gets wizwar's contact paragraph (mail, Bluesky, Mastodon,
the source), and the colophons, the guide and the rules page each carry
a one-line way to report a rule read wrong.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0141G6xqLeNRYEtviLWSB5Up

src/routes/join/[code]/+page.svelte

@@ -191,7 +191,7 @@
 {/if}
 
 <footer class="colophon">
-	<p>After Richard Bartle's <em>Waving Hands</em> (1977), also known as Spellbinder and Spellcaster. <a href="/rules">Read the full rules</a>.</p>
+	<p>After Richard Bartle's <em>Waving Hands</em> (1977), also known as Spellbinder and Spellcaster. <a href="/rules">Read the full rules</a>. A rule read wrong or a bug found: <a href="mailto:eric@ericwagoner.com">send word</a>.</p>
 </footer>
 
 <style>