👌(layout) add template block around footer slogan

We need a template block around footer slogan so projects can change
it or even disable it if needed.

This just update the base.html to put the slogan in a template block
"body_footer_title".

CHANGELOG.md

@@ -17,6 +17,7 @@ Versioning](https://semver.org/spec/v2.0.0.html).
 - Change course detail content titles to neutral dark color.
 - Customize CMS placeholder menu for more readability.
 - Make login/logout CTA more visible.
+- Add template block around footer slogan.
 
 ### Fixed
 

src/richie/apps/core/templates/richie/base.html

@@ -126,7 +126,9 @@
                         </a>
                     </div>
                     <div class="body-footer__insert">
-                        <p class="body-footer__title">{% trans "Life-changing learning!" %}</p>
+                        {% block body_footer_title %}
+                            <p class="body-footer__title">{% trans "Life-changing learning!" %}</p>
+                        {% endblock body_footer_title %}
                         {% language_chooser "menu/language_menu.html" %}
                         <div class="body-footer__badges">
                             {% include "social-networks/footer-badges.html" %}