Bump django from 4.2.15 to 4.2.16 in /backend

Bumps [django](https://github.com/django/django) from 4.2.15 to 4.2.16.
- [Commits](https://github.com/django/django/compare/4.2.15...4.2.16)

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

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

backend/poetry.lock

@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 1.5.1 and should not be changed by hand.
+# This file is automatically @generated by Poetry 1.8.3 and should not be changed by hand.
 
 [[package]]
 name = "amqp"
@@ -617,13 +617,13 @@ with-social = ["django-allauth (>=0.40.0,<0.53.0)"]
 
 [[package]]
 name = "django"
-version = "4.2.15"
+version = "4.2.16"
 description = "A high-level Python web framework that encourages rapid development and clean, pragmatic design."
 optional = false
 python-versions = ">=3.8"
 files = [
-    {file = "Django-4.2.15-py3-none-any.whl", hash = "sha256:61ee4a130efb8c451ef3467c67ca99fdce400fedd768634efc86a68c18d80d30"},
-    {file = "Django-4.2.15.tar.gz", hash = "sha256:c77f926b81129493961e19c0e02188f8d07c112a1162df69bfab178ae447f94a"},
+    {file = "Django-4.2.16-py3-none-any.whl", hash = "sha256:1ddc333a16fc139fd253035a1606bb24261951bbc3a6ca256717fa06cc41a898"},
+    {file = "Django-4.2.16.tar.gz", hash = "sha256:6f1616c2786c408ce86ab7e10f792b8f15742f7b7b7460243929cb371e7f1dad"},
 ]
 
 [package.dependencies]
@@ -2516,7 +2516,7 @@ files = [
 ]
 
 [package.dependencies]
-greenlet = {version = "!=0.4.17", markers = "python_version >= \"3\" and (platform_machine == \"win32\" or platform_machine == \"WIN32\" or platform_machine == \"AMD64\" or platform_machine == \"amd64\" or platform_machine == \"x86_64\" or platform_machine == \"ppc64le\" or platform_machine == \"aarch64\")"}
+greenlet = {version = "!=0.4.17", markers = "python_version >= \"3\" and (platform_machine == \"aarch64\" or platform_machine == \"ppc64le\" or platform_machine == \"x86_64\" or platform_machine == \"amd64\" or platform_machine == \"AMD64\" or platform_machine == \"win32\" or platform_machine == \"WIN32\")"}
 
 [package.extras]
 aiomysql = ["aiomysql", "greenlet (!=0.4.17)"]