Fix import of common.djangoapps.util.date_utils (#25558)

themes/edx.org/lms/templates/dashboard.html

@@ -13,7 +13,7 @@ from django.utils.translation import ugettext as _
 from django.template import RequestContext
 from common.djangoapps.third_party_auth import pipeline
 from django.urls import reverse
-from common.djangoapps.date_utils import strftime_localized
+from common.djangoapps.util.date_utils import strftime_localized
 from opaque_keys.edx.keys import CourseKey
 from openedx.core.djangoapps.content.course_overviews.models import CourseOverview
 from openedx.core.djangoapps.theming import helpers as theming_helpers