Bump dj-stripe from 2.8.4 to 2.9.0

Bumps [dj-stripe](https://github.com/dj-stripe/dj-stripe) from 2.8.4 to 2.9.0.
- [Release notes](https://github.com/dj-stripe/dj-stripe/releases)
- [Commits](dj-stripe/dj-stripe@2.8.4...2.9.0)

---
updated-dependencies:
- dependency-name: dj-stripe
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

pyproject.toml

@@ -6,7 +6,7 @@ dependencies = [
     "beautifulsoup4==4.12.3",
     "bleach==6.1.0",
     "boto3==1.35.10",
-    "dj-stripe==2.8.4",
+    "dj-stripe==2.9.0",
     "django-allauth>=65.0.1",
     "django-anymail[sendgrid]==11.1",
     "django-debug-toolbar==4.4.6",