chore(deps): bump django from 5.2.14 to 5.2.15

Bumps [django](https://github.com/django/django) from 5.2.14 to 5.2.15.
- [Commits](django/django@5.2.14...5.2.15)

---
updated-dependencies:
- dependency-name: django
  dependency-version: 5.2.15
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements.txt

@@ -20,7 +20,7 @@ django-slack==5.19.0
 django-watson==1.6.3
 django-permissions-policy==4.32.0
 django-prometheus==2.5.0
-Django==5.2.14
+Django==5.2.15
 django-single-session==0.2.0
 djangorestframework==3.17.1
 html2text==2025.4.15