CI: install missing python3-django-filters

Signed-off-by: Rémi Duraffort <remi.duraffort@linaro.org>
10 jobs for master in 10 minutes and 23 seconds (queued for 3 seconds)
Status Name Job ID Coverage
  Test
passed dispatcher/install/buster #59672
amd64

00:04:13

passed dispatcher/install/stretch-backports #59670
amd64

00:04:12

passed dispatcher/upgrade/buster #59673
amd64

00:07:56

passed dispatcher/upgrade/stretch-backports #59671
amd64

00:06:30

passed server/install/buster #59668
amd64

00:04:23

passed server/install/stretch-backports #59666
amd64

00:04:28

passed server/upgrade/buster #59669
amd64

00:09:45

passed server/upgrade/stretch-backports #59667
amd64

00:08:40

 
  Publish
skipped failure #59674
amd64
passed success #59675
amd64

00:00:38