Bump slack-sdk from 3.33.1 to 3.33.3

Bumps [slack-sdk](https://github.com/slackapi/python-slack-sdk) from 3.33.1 to 3.33.3.
- [Release notes](https://github.com/slackapi/python-slack-sdk/releases)
- [Commits](slackapi/python-slack-sdk@v3.33.1...v3.33.3)

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

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -19,7 +19,7 @@ reverse-geocoder==1.5.1
 requests~=2.32.3
 sentry-sdk==2.17.0
 setproctitle~=1.3.3
-slack_sdk==3.33.1
+slack_sdk==3.33.3
 Werkzeug~=3.1.1
 setuptools>=65.5.1 # not directly required, pinned by Snyk to avoid a vulnerability
 certifi>=2023.7.22 # not directly required, pinned by Snyk to avoid a vulnerability