Add a package to the ecosystem (#622)

Adding PyBaMM to the 'Ecosystem' section of the homepage.

Co-authored-by: Inessa Pawson <inessapawson@gmail.com>

Author: MattiaAldighieri

layouts/partials/scientific-domains.html

@@ -100,7 +100,7 @@
             <td class="lastrow-center-text"><a href="http://etetoolkit.org/">ETE</a></td>
             <td class="lastrow-center-text"><a href="https://emcee.readthedocs.io/">emcee</a></td>
             <td class="lastrow-center-text"><a href="https://fenicsproject.org/">FEniCS</a></td>
-            <td class="lastrow-center-text"></td>
+            <td class="lastrow-center-text"><a href="https://www.pybamm.org">PyBaMM</a></td>
             <td class="lastrow-center-text"><a href="https://www.fatiando.org/">Fatiando a Terra</a></td>
             <td class="lastrow-center-text"></td>
             <td class="lastrow-center-text"></td>