add sections for libraries page

libraries/index.html

@@ -22,6 +22,7 @@ permalink: /libraries
       The full list of all the CircuitPython libraries contained in the following bundles
       can be found on the
       <a href="https://circuitpython.readthedocs.io/projects/bundle/en/latest/drivers.html" title="">libraries page</a>.
+    <section>
       <h2>Download and Installation Instructions</h2>
       <p>
         The libraries in each release are compiled to .mpy for all recent major versions
@@ -75,6 +76,8 @@ permalink: /libraries
           </p>
         </div>
       </div>
+    </section>
+    <section>
       <h2>Contributing</h2>
       <p>
         If you'd like to contribute to the CircuitPython project, the CircuitPython
@@ -123,6 +126,7 @@ permalink: /libraries
         {% endfor %}
         </ul>
       </div>
+    </section>
   </div>
 </div>