Update slack-sdk requirement from <=3.26.0 to <=3.37.0

Updates the requirements on [slack-sdk](https://github.com/slackapi/python-slack-sdk) to permit the latest version.
- [Release notes](https://github.com/slackapi/python-slack-sdk/releases)
- [Commits](slackapi/python-slack-sdk@1.0.0...v3.37.0)

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

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

Author: dependabot[bot]

pyproject.toml

@@ -35,7 +35,7 @@ dependencies = [
   # selenium 4.0 breaks with arm geckodriver.
   'selenium==3.141.0',
   'setuptools-rust<=1.12.0',
-  'slack-sdk<=3.26.0',
+  'slack-sdk<=3.37.0',
   'sounddevice<=0.4.5',
   'soundfile',
   'supervisor<=4.2.4',