Bump slack-sdk from 3.31.0 to 3.35.0

Bumps [slack-sdk](https://github.com/slackapi/python-slack-sdk) from 3.31.0 to 3.35.0.
- [Release notes](https://github.com/slackapi/python-slack-sdk/releases)
- [Commits](slackapi/python-slack-sdk@v3.31.0...v3.35.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

poetry.lock

@@ -22,7 +22,7 @@ blessings = "^1.7"
 PyGithub = "^2.2.0"
 gitpython = "^3.1.43"
 sendgrid = "^6.11"
-slack_sdk = "^3.31.0"
+slack_sdk = "^3.35.0"
 
 [tool.poetry.group.dev.dependencies]
 demisto-sdk = "1.37.1" # Only affects GitHub Actions. To control the SDK version elsewhere, modify the infra repo's pyproject file