chore(deps): bump stripe from 11.1.0 to 11.2.0 in /backend/requirements

Bumps [stripe](https://github.com/stripe/stripe-python) from 11.1.0 to 11.2.0.
- [Release notes](https://github.com/stripe/stripe-python/releases)
- [Changelog](https://github.com/stripe/stripe-python/blob/master/CHANGELOG.md)
- [Commits](stripe/stripe-python@v11.1.0...v11.2.0)

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

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

backend/requirements/base.txt

@@ -8,7 +8,7 @@ hiredis==3.0.0                          # https://github.com/redis/hiredis-py
 redis==5.1.0                            # https://github.com/redis/redis-py
 celery==5.4.0                           # https://github.com/celery/celery
 flower==2.0.1                           # https://github.com/mher/flower
-stripe==11.1.0                          # https://github.com/stripe/stripe-python
+stripe==11.2.0                          # https://github.com/stripe/stripe-python
 
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