search: don't use naive datetime when updating index (#21027)

combo/apps/search/management/commands/update_index.py

@@ -14,7 +14,7 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-import datetime
+from django.utils.timezone import now
 
 from haystack.management.commands.update_index import Command as UpdateIndexCommand
 
@@ -38,7 +38,7 @@ class Command(UpdateIndexCommand):
         return super(Command, self).handle(**options)
 
     def collect_external_links(self):
-        start_time = datetime.datetime.now()
+        start_time = now()
 
         # assemble external links data
         links = {}