necessary cookielaw template fix for Django 4.1

www/maposmatic/templates/maposmatic/base.html

@@ -94,7 +94,7 @@
     {% include "./base-parts/navbar.html" %}
 
     <div class="container" style="margin-top: 5em;">
-      {% cookielaw_banner %}
+      {% CookielawBanner %}
 
       {% if MAINTENANCE_NOTICE %}
       <div class="alert alert-danger">