build(deps): update django requirement from <5.2,>=5.1.9 to >=5.1.9,<5.3

Updates the requirements on [django](https://github.com/django/django) to permit the latest version.
- [Commits](django/django@5.1.9...5.2.1)

---
updated-dependencies:
- dependency-name: django
  dependency-version: 5.2.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pyproject.toml

@@ -27,7 +27,7 @@ urls.Repository = "https://github.com/freelawproject/bigcases2"
 urls."Organisation Homepage" = "https://free.law/"
 
 dependencies = [
-    "Django>=5.1.9,<5.2",
+    "Django>=5.1.9,<5.3",
     "Mastodon.py>=2.0.1",
     "ada-url>=1.23.0",
     "ansicolors>=1.1.8",