Bump backoff from 1.10.0 to 2.2.1 (#297)

Bumps [backoff](https://github.com/litl/backoff) from 1.10.0 to 2.2.1.
- [Release notes](https://github.com/litl/backoff/releases)
- [Changelog](https://github.com/litl/backoff/blob/master/CHANGELOG.md)
- [Commits](litl/backoff@v1.10.0...v2.2.1)

---
updated-dependencies:
- dependency-name: backoff
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

requirements.txt

@@ -3,7 +3,7 @@ appdirs==1.4.4
 astroid==1.6.6
 async-timeout==3.0.1
 attrs==23.1.0
-backoff==1.10.0
+backoff==2.2.1
 bleach==6.0.0
 botocore==1.29.40
 Cerberus==1.3.5