chore: pip: bump slack-sdk from 3.26.1 to 3.26.2

Bumps [slack-sdk](https://github.com/slackapi/python-slack-sdk) from 3.26.1 to 3.26.2.
- [Release notes](https://github.com/slackapi/python-slack-sdk/releases)
- [Changelog](https://github.com/slackapi/python-slack-sdk/blob/main/docs-v2/changelog.html)
- [Commits](slackapi/python-slack-sdk@v3.26.1...v3.26.2)

---
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

@@ -1,5 +1,5 @@
 docker-py==1.10.6
 python-dotenv==1.0.0
 python-on-whales==0.68.0
-slack_sdk==3.26.1
+slack_sdk==3.26.2
 urllib3<2 # Todo: check https://github.com/docker/docker-py/issues/3113