Bump django from 4.0.4 to 4.0.6 in /backend

Bumps [django](https://github.com/django/django) from 4.0.4 to 4.0.6.
- [Release notes](https://github.com/django/django/releases)
- [Commits](https://github.com/django/django/compare/4.0.4...4.0.6)

---
updated-dependencies:
- dependency-name: django
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

backend/poetry.lock

@@ -331,7 +331,7 @@ with_social = ["django-allauth (>=0.40.0,<0.48.0)"]
 
 [[package]]
 name = "django"
-version = "4.0.4"
+version = "4.0.6"
 description = "A high-level Python web framework that encourages rapid development and clean, pragmatic design."
 category = "main"
 optional = false
@@ -1684,8 +1684,8 @@ dj-rest-auth = [
     {file = "dj-rest-auth-2.2.3.tar.gz", hash = "sha256:f292f3dffb8fc896da10adf47e94a254fb8bf42e672a066e63566363d764ad42"},
 ]
 django = [
-    {file = "Django-4.0.4-py3-none-any.whl", hash = "sha256:07c8638e7a7f548dc0acaaa7825d84b7bd42b10e8d22268b3d572946f1e9b687"},
-    {file = "Django-4.0.4.tar.gz", hash = "sha256:4e8177858524417563cc0430f29ea249946d831eacb0068a1455686587df40b5"},
+    {file = "Django-4.0.6-py3-none-any.whl", hash = "sha256:ca54ebedfcbc60d191391efbf02ba68fb52165b8bf6ccd6fe71f098cac1fe59e"},
+    {file = "Django-4.0.6.tar.gz", hash = "sha256:a67a793ff6827fd373555537dca0da293a63a316fe34cb7f367f898ccca3c3ae"},
 ]
 django-celery-results = [
     {file = "django_celery_results-2.2.0-py2.py3-none-any.whl", hash = "sha256:d5f83fad9091e52cd6dbb3ca80632153ad14b6cdac4d73258e040f92717237cb"},