⬆️(dependencies) update django to v5.2.9 [SECURITY]

Author: renovate[bot]

src/backend/pyproject.toml

@@ -39,7 +39,7 @@ dependencies = [
     "django-redis==6.0.0",
     "django-storages[s3]==1.14.6",
     "django-timezone-field>=5.1",
-    "django==5.2.8",
+    "django==5.2.9",
     "django-treebeard==4.7.1",
     "djangorestframework==3.16.1",
     "drf_spectacular==0.29.0",