build(deps): bump stripe from 8.4.0 to 8.5.0 in /backend

Bumps [stripe](https://github.com/stripe/stripe-python) from 8.4.0 to 8.5.0.
- [Release notes](https://github.com/stripe/stripe-python/releases)
- [Changelog](https://github.com/stripe/stripe-python/blob/master/CHANGELOG.md)
- [Commits](stripe/stripe-python@v8.4.0...v8.5.0)

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

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

Author: dependabot[bot]

backend/poetry.lock

@@ -25,7 +25,7 @@ itsdangerous = "^2.1"
 PyGithub = "^2.2"
 vcrpy = "^6.0.1"
 python-gitlab = "^4.4"
-stripe = "^8.4"
+stripe = "^8.5"
 PyJWT = "^2.7.0"
 meilisearch = "^0.30.0"
 orjson = "^3.9.15"