Bump Django version to 3.1.4
Bump Django version to 3.1.4

healthchecks/healthchecks,iphoting/healthchecks,healthchecks/healthchecks,healthchecks/healthchecks,healthchecks/healthchecks,iphoting/healthchecks,iphoting/healthchecks,iphoting/healthchecks