CI: install missing python3-django-filters

Signed-off-by: Rémi Duraffort <remi.duraffort@linaro.org>
10 jobs for master in 12 minutes and 1 second (queued for 1 second)
latest
Status Job ID Name Coverage
  Test
passed #60532
amd64
dispatcher/install/buster

00:05:24

passed #60530
amd64
dispatcher/install/stretch-backports

00:05:11

passed #60533
amd64
dispatcher/upgrade/buster

00:09:22

passed #60531
amd64
dispatcher/upgrade/stretch-backports

00:07:40

passed #60528
amd64
server/install/buster

00:05:25

passed #60526
amd64
server/install/stretch-backports

00:05:29

passed #60529
amd64
server/upgrade/buster

00:11:20

passed #60527
amd64
server/upgrade/stretch-backports

00:10:04

 
  Publish
skipped #60534
amd64
failure
passed #60535
amd64
success

00:00:40