fix markdown / html typo in rules

next/rules.html

@@ -577,7 +577,7 @@ The “<a href="#dates">Important IOCCC dates</a>” section above is part of th
 </div>
 <p class="leftbar">
 Your submission must be a C program.
-</div>
+</p>
 <p>Jump to: <a href="#">top</a></p>
 <div id="rule2">
 <h2 id="rule-2">Rule 2</h2>