Acknowledgements Page: Update W3C Staff Editors (pull #3143)

Add daniel-montalvo and move Michael Cooper to previous editors.

content/about/acknowledgements/acknowledgements.html

@@ -36,10 +36,14 @@ <h2>Editors</h2>
             <span class="p-name fn">Zoë Bijl</span> (<span class="p-org org h-org">Invited Expert</span>)
           </dd>
           <dd class="editor p-author h-card vcard" data-editor-id="34017">
-            <a class="u-url url p-name fn" href="https://www.w3.org/People/cooper/">Michael Cooper</a>
+            <a class="u-url url p-name fn" href="https://www.w3.org/staff/#dmontalvo">Daniel Montalvo</a>
             (<span class="p-org org h-org">W3C</span>)
           </dd>
           <dt>Former editors:</dt>
+          <dd class="editor p-author h-card vcard" data-editor-id="34017">
+            <span class="p-name fn">Michael Cooper</span> (<span class="p-org org h-org">W3C</span>) - Until
+            <time datetime="2023-07-31">31 July 2023</time>
+          </dd>
           <dd class="editor p-author h-card vcard" data-editor-id="42279">
             <span class="p-name fn">Joseph Scheuhammer</span> (<span class="p-org org h-org">Inclusive Design
               Research Centre, OCAD University</span>) - Until