Bump slack-sdk from 3.36.0 to 3.37.0 in /backend (#2377)

Bumps [slack-sdk](https://github.com/slackapi/python-slack-sdk) from 3.36.0 to 3.37.0.
- [Release notes](https://github.com/slackapi/python-slack-sdk/releases)
- [Commits](slackapi/python-slack-sdk@v3.36.0...v3.37.0)

---
updated-dependencies:
- dependency-name: slack-sdk
  dependency-version: 3.37.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

backend/poetry.lock

@@ -43,7 +43,7 @@ reportlab = "^4.4.2"
 requests = "^2.32.5"
 sentry-sdk = { extras = [ "django" ], version = "^2.20.0" }
 slack-bolt = "^1.22.0"
-slack-sdk = "^3.35.0"
+slack-sdk = "^3.37.0"
 strawberry-graphql = { extras = [ "django" ], version = "^0.282.0" }
 strawberry-graphql-django = "^0.65.1"
 thefuzz = "^0.22.1"