build(deps): bump django from 3.2.25 to 5.1.4

Bumps [django](https://github.com/django/django) from 3.2.25 to 5.1.4.
- [Commits](django/django@3.2.25...5.1.4)

---
updated-dependencies:
- dependency-name: django
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

pyproject.toml

@@ -8,7 +8,7 @@ license = { text = "AGPL-3.0-only" }
 classifiers = ["Private :: Do Not Upload"]
 requires-python = ">=3.12,<3.13"
 dependencies = [
-    "django==3.2.25",
+    "django==5.1.4",
     "pillow>=11.0.0",
     "cssmin==0.2.0",
     "cssselect==1.2.0",