chore(deps): bump django in /tests/apps/dockerfile-release

Bumps [django](https://github.com/django/django) from 3.1.6 to 3.1.8.
- [Release notes](https://github.com/django/django/releases)
- [Commits](https://github.com/django/django/compare/3.1.6...3.1.8)

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

tests/apps/dockerfile-release/Pipfile.lock

@@ -18,10 +18,10 @@
     "default": {
         "asgiref": {
             "hashes": [
-                "sha256:5ee950735509d04eb673bd7f7120f8fa1c9e2df495394992c73234d526907e17",
-                "sha256:7162a3cb30ab0609f1a4c95938fd73e8604f63bdba516a7f7d64b83ff09478f0"
+                "sha256:92906c611ce6c967347bbfea733f13d6313901d54dcca88195eaeb52b2a8e8ee",
+                "sha256:d1216dfbdfb63826470995d31caed36225dcaf34f182e0fa257a4dd9e86f1b78"
             ],
-            "version": "==3.3.1"
+            "version": "==3.3.4"
         },
         "dj-database-url": {
             "hashes": [
@@ -33,11 +33,11 @@
         },
         "django": {
             "hashes": [
-                "sha256:169e2e7b4839a7910b393eec127fd7cbae62e80fa55f89c6510426abf673fe5f",
-                "sha256:c6c0462b8b361f8691171af1fb87eceb4442da28477e12200c40420176206ba7"
+                "sha256:c348b3ddc452bf4b62361f0752f71a339140c777ebea3cdaaaa8fdb7f417a862",
+                "sha256:f8393103e15ec2d2d313ccbb95a3f1da092f9f58d74ac1c61ca2ac0436ae1eac"
             ],
             "index": "pypi",
-            "version": "==3.1.6"
+            "version": "==3.1.8"
         },
         "djangorestframework": {
             "hashes": [