Bump django from 4.2.6 to 4.2.7 in /backend

Bumps [django](https://github.com/django/django) from 4.2.6 to 4.2.7.
- [Commits](django/django@4.2.6...4.2.7)

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

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

backend/requirements.txt

@@ -12,7 +12,7 @@ beautifulsoup4==4.12.2
     # via -r requirements.in
 dj-database-url==2.1.0
     # via -r requirements.in
-django==4.2.6
+django==4.2.7
     # via
     #   -r requirements.in
     #   dj-database-url
@@ -62,7 +62,9 @@ soupsieve==2.4.1
 sqlparse==0.4.4
     # via django
 typing-extensions==4.6.2
-    # via dj-database-url
+    # via
+    #   asgiref
+    #   dj-database-url
 tzdata==2023.3
     # via pytz-deprecation-shim
 tzlocal==5.0.1