message: [website] Adds Matomo tracking image
diff: <div>
  <h2>Explore</h2>
  <p>
  - You want to add interaction, so that your users can dig into the graph. You want to add a search
  - field, and allow users to see the neighborhood of a node when hovering it.
  + You want to add interaction, so that your users can dig into the graph. You want to add a search field,
  + and allow users to see the neighborhood of a node when hovering it.
  </p>
  <p>
  <a href="https://githubbox.com/jacomyal/sigma.js/tree/main/examples/use-reducers" class="button">
  </p>
  </section>
  </footer>
  + <img src="https://matomo.ouestware.com/matomo.php?idsite=26&rec=1&action_name=Homepage&send_image=0" alt="" />
  </body>
  </html>
  