fix(deps): update module github.com/slack-go/slack to v0.23.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
github.com/slack-go/slack	v0.23.0 → v0.23.1

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Release Notes

slack-go/slack (github.com/slack-go/slack)

v0.23.1

Compare Source

[!IMPORTANT]
Even though this is a [security] patch release, if you were using an empty secret, this is a breaking change due to a change in behaviour. That's on purpose, to ensure you fix your approach so that there are no footguns.

Fixed

• NewSecretsVerifier now rejects empty signing secrets to avoid accepting forged request
  signatures when applications are misconfigured.

Full Changelog: slack-go/slack@v0.23.0...v0.23.1

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.22%. Comparing base (5ac44f2) to head (f74c9ac).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #38   +/-   ##
=======================================
  Coverage   96.22%   96.22%           
=======================================
  Files          10       10           
  Lines         636      636           
=======================================
  Hits          612      612           
  Misses         19       19           
  Partials        5        5           

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