chore(deps): update dependency slack to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
slack	orb	major	5.2.3 → 6.1.3

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.34%. Comparing base (f277f45) to head (eb5152b).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #237   +/-   ##
=======================================
  Coverage   70.34%   70.34%           
=======================================
  Files          49       49           
  Lines        1966     1966           
=======================================
  Hits         1383     1383           
  Misses        583      583           

Flag	Coverage Δ
connectors	70.34% <ø> (ø)

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