CI: install missing python3-django-filters

Signed-off-by: Rémi Duraffort <remi.duraffort@linaro.org>
10 jobs for master in 10 minutes and 28 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Test
passed #53773
amd64
dispatcher/install/buster

00:04:16

passed #53771
amd64
dispatcher/install/stretch-backports

00:04:16

passed #53774
amd64
dispatcher/upgrade/buster

00:08:05

passed #53772
amd64
dispatcher/upgrade/stretch-backports

00:06:32

passed #53769
amd64
server/install/buster

00:04:29

passed #53767
amd64
server/install/stretch-backports

00:04:25

passed #53770
amd64
server/upgrade/buster

00:09:50

passed #53768
amd64
server/upgrade/stretch-backports

00:08:43

 
  Publish
skipped #53775
amd64
failure
passed #53776
amd64
success

00:00:37