Added a link to GitHub pull request #534 in the motivation & backgrou…

…nd section.

2024/sdw-wg.html

@@ -168,6 +168,10 @@ <h2>Motivation and Background</h2>
       <p><i class=todo>Background of landscape, technology, and
           relationship to the Web, users, developers, implementers, and
           industry.</i>
+
+      <p><i class=todo>[Under development
+	  in <a href="https://github.com/w3c/charter-drafts/pull/534"
+	  >GitHub pull request 534</a>.]</i>
     </div>
 
     <section class=scope id=scope>
@@ -764,4 +768,4 @@ <h3>Change log</h3>
         href="https://www.w3.org/Consortium/Legal/ipr-notice#W3C_Trademarks">trademark</a> and <a
         href="https://www.w3.org/Consortium/Legal/2015/copyright-software-and-document" rel=license
         title="W3C Software and Document Notice and License">permissive document license</a> rules apply.
-  </footer>
+  </footer>