📌(back) keep django in version 5.1

We want to wait before upgrading to django 5.2, we will upgrade it in
few weeks

Author: lunika

renovate.json

@@ -9,6 +9,16 @@
       "matchManagers": ["pep621"],
       "matchPackageNames": []
     },
+    {
+      "groupName": "allowed django versions",
+      "matchManagers": [
+        "pep621"
+      ],
+      "matchPackageNames": [
+        "Django"
+      ],
+      "allowedVersions": "<5.2"
+    },
     {
       "enabled": false,
       "groupName": "ignored js dependencies",

src/backend/pyproject.toml

@@ -38,7 +38,7 @@ dependencies = [
     "django-redis==5.4.0",
     "django-storages[s3]==1.14.6",
     "django-timezone-field>=5.1",
-    "django==5.2",
+    "django==5.1.8",
     "django-treebeard==4.7.1",
     "djangorestframework==3.16.0",
     "drf_spectacular==0.28.0",