Missing HTML tag in category.html

[pyjavo]

For chapter 18 in the AJAX exercise, the <div> tag with the page-listing ID that wraps the block of markup and template code is missing in this file:

https://github.com/tangowithcode/tango_with_django_4_code/blob/main/tango_with_django_project/rango/templates/rango/category.html