[2.2.x] Fixed #30437 -- Clarified that urlpatterns can be a sequence.

Backport of 8aad332 from master

docs/topics/http/urls.txt

@@ -41,8 +41,8 @@ algorithm the system follows to determine which Python code to execute:
    :setting:`ROOT_URLCONF` setting.
 
 #. Django loads that Python module and looks for the variable
-   ``urlpatterns``. This should be a Python list of :func:`django.urls.path`
-   and/or :func:`django.urls.re_path` instances.
+   ``urlpatterns``. This should be a :term:`sequence` of
+   :func:`django.urls.path` and/or :func:`django.urls.re_path` instances.
 
 #. Django runs through each URL pattern, in order, and stops at the first
    one that matches the requested URL.
@@ -317,8 +317,8 @@ accessed. This makes the system blazingly fast.
 Syntax of the ``urlpatterns`` variable
 ======================================
 
-``urlpatterns`` should be a Python list of :func:`~django.urls.path` and/or
-:func:`~django.urls.re_path` instances.
+``urlpatterns`` should be a :term:`sequence` of :func:`~django.urls.path`
+and/or :func:`~django.urls.re_path` instances.
 
 Error handling
 ==============