fix: fixed django40 warnings (#29641)

* fix: fixed django4 warnings
Co-authored-by: UsamaSadiq <usama.sadiq@arbisoft.com>

openedx/testing/coverage_context_listener/urls.py

@@ -1,9 +1,9 @@
 """
 Coverage Context Listener URLs.
 """
-from django.conf.urls import url
+from django.urls import path
 from .views import update_context
 
 urlpatterns = [
-    url(r'update_context', update_context),
+    path('update_context', update_context),
 ]