Add funding and status note to demo

Author: jamesnw

index.html

@@ -174,6 +174,19 @@ <h2>Anchoring Elements Using CSS</h2>
           >.
         </li>
       </ul>
+      <p>
+        <strong>Note: </strong>This polyfill was implemented against an early
+        version of the spec, and updates were paused to allow the syntax to
+        solidify. Now that browsers are working on implementation, we would like
+        to bring it up to date, and welcome
+        <a
+          href="https://github.com/oddbird/css-anchor-positioning"
+          target="_blank"
+          rel="noopener noreferrer"
+          >code contributions</a
+        >
+        and <a href="#sponsor">financial support</a> to make that happen.
+      </p>
     </section>
     <section id="anchor-positioning" class="demo-item">
       <h2>
@@ -647,6 +660,29 @@ <h2>
   top: anchor(--my-anchor-update bottom);
 }</code></pre>
     </section>
+    <section id="sponsor">
+      <h2>Sponsor OddBird's OSS Work</h2>
+      <p>
+        At OddBird, we love contributing to the languages & tools developers
+        rely on. We're currently working on polyfills for new Popover & Anchor
+        Positioning functionality, as well as CSS specifications for functions,
+        mixins, and responsive typography. Help us keep this work sustainable
+        and centered on your needs as a developer! We display sponsor logos and
+        avatars on our
+        <a
+          href="https://www.oddbird.net/polyfill/#open-source-sponsors"
+          target="_blank"
+          rel="noopener noreferrer"
+          >website</a
+        >.
+      </p>
+      <a
+        href="https://opencollective.com/oddbird-open-source"
+        target="_blank"
+        rel="noopener noreferrer"
+        >Sponsor OddBird's OSS Work</a
+      >
+    </section>
     <footer>
       <p>
         Spec proposal by