Update public/index.html

public/index.html

@@ -30,6 +30,8 @@
     <h2>Non-profit / Social profit / NGO</h2>
     <ul>
       <li>Archive.org: <a href="https://mastodon.archive.org/explore">https://mastodon.archive.org</a></li>
+      <li>Open Collective: <a href="https://mastodon.opencollective.com/explore">https://mastodon.opencollective.com</a></li>
+      <li>Raspberry Pi: <a href="https://raspberrypi.social/explore">https://raspberrypi.social</a></li>
       <li>...</li>
     </ul>
 
@@ -39,10 +41,10 @@
       <li>...</li>
     </ul>
 
-    <h2>Opensource</h2>
+    <!-- <h2>Opensource projects</h2>
     <ul>
       <li>...</li>
-    </ul>
+    </ul> -->
 
     <hr>