Bump types-requests in /spiffworkflow-backend (#2084)

Bumps [types-requests](https://github.com/python/typeshed) from 2.32.0.20240712 to 2.32.0.20240914.
- [Commits](https://github.com/python/typeshed/commits)

---
updated-dependencies:
- dependency-name: types-requests
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>