test xmlns:cc error fix

According to the Nu Html Checker:

((ERROR)) Attribute xmlns:cc not allowed here:
From line 465, column 3; to line 465, column 48

This is a hand edit of index.html to test this fix.

index.html

@@ -211,7 +211,7 @@ You may also check on the <a href="status.json">status.json</a> for the current
   <p>All IOCCC content including this file and web page are:</p>
   <b>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Copyright &copy; 1984-2024 by Landon Curt Noll. <a href="https://creativecommons.org/faq/#what-does-some-rights-reserved-mean">Some Rights Reserved</a>.</b>
   <p>This work is licensed by Landon Curt Noll under:</p>
-  <p xmlns:cc="http://creativecommons.org/ns#" ><b><a href="https://creativecommons.org/licenses/by-sa/4.0/?ref=chooser-v1"
+  <p><b><a href="https://creativecommons.org/licenses/by-sa/4.0/?ref=chooser-v1"
   target="_blank" rel="license noopener noreferrer" style="display:inline-block;">&nbsp;&nbsp;&nbsp;&nbsp;CC BY-SA 4.0
   <img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;"
   src="./png/cc.png"