Bump slack-sdk from 3.35.0 to 3.36.0 in /demos (#1598)

Bumps [slack-sdk](https://github.com/slackapi/python-slack-sdk) from 3.35.0 to 3.36.0.
- [Release notes](https://github.com/slackapi/python-slack-sdk/releases)
- [Commits](slackapi/python-slack-sdk@v3.35.0...v3.36.0)

---
updated-dependencies:
- dependency-name: slack-sdk
  dependency-version: 3.36.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

demos/moderator_bot/requirements-dev.txt

@@ -18,7 +18,7 @@ pyyaml==6.0.2
 scikit-learn==1.7.0
 scipy==1.16.1
 six==1.17.0
-slack_sdk==3.35.0
+slack_sdk==3.36.0
 urllib3==2.5.0
 yarl==1.20.1
 zipp==3.23.0