chore: release slack-cli v4.6.0

[slack-cli-releaser]

Summary

Release v4.6.0.

Testing

• Confirm unit tests and E2E tests are passing on the branch.
• Confirm unit tests and E2E tests are passing on this PR.
• Confirm the dev-build includes all commits since last release.
• Review open issues or PRs on the "Next Release" milestone.
• Confirm the new version matches the expected next version.

Reviewers

After merging, create a GitHub Release to tag the new version.

Requirements

• I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.03%. Comparing base (b6ea8e7) to head (c84ab6d).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #621      +/-   ##
==========================================
- Coverage   72.04%   72.03%   -0.02%     
==========================================
  Files         233      233              
  Lines       19659    19659              
==========================================
- Hits        14164    14161       -3     
- Misses       4254     4255       +1     
- Partials     1241     1243       +2     

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