Bump django from 5.2.7 to 5.2.8 in /backend in the pip group across 1 directory (#4493)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

backend/pyproject.toml

@@ -44,7 +44,7 @@ known-first-party = [
 [project]
 requires-python = ">=3.13.5"
 dependencies = [
-    "django==5.2.7",
+    "django==5.2.8",
     "django-environ==0.10.0",
     "django-model-utils==5.0.0",
     "django-timezone-field==7.0",