Corrected the page title

Corrected the page title to 'Data retention'

app/templates/views/service-settings/data-retention.html

@@ -4,7 +4,7 @@
 {% from "components/table.html" import mapping_table, row_group, row, text_field, edit_field, field, boolean_field, list_table with context %}
 
 {% block service_page_title %}
-  Email reply-to addresses
+  Data retention
 {% endblock %}
 
 {% block maincolumn_content %}