Correcting links in public/index.html

Closes #40004.

public/index.html

@@ -113,13 +113,13 @@
       <a href="https://tor.stackexchange.com/">{{ GetText .Lang "Tor Q&A Site" }}</a>
     </li>
     <li>
-      <a href="https://www.torproject.org/getinvolved/volunteer.html">{{ GetText .Lang "Volunteer" }}</a>
+      <a href="https://community.torproject.org/">{{ GetText .Lang "Volunteer" }}</a>
     </li>
     <li>
-      <a href="https://trac.torproject.org/projects/tor/wiki/TorRelayGuide">{{ GetText .Lang "Run a Relay" }}</a>
+      <a href="https://community.torproject.org/relay/">{{ GetText .Lang "Run a Relay" }}</a>
     </li>
     <li>
-      <a href="https://www.torproject.org/download/download.html#warning">{{ GetText .Lang "Stay Anonymous" }}</a>
+      <a href="https://support.torproject.org/faq/staying-anonymous/">{{ GetText .Lang "Stay Anonymous" }}</a>
     </li>
   </ul>
 {{ end }}