chore(backport release-1.0): docs: authorise kargo to argocd-update

[akuitybot]

Automated backport to release-1.0, triggered by a label in #2962.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 48.82%. Comparing base (f8c53b9) to head (45dc61b).
Report is 1 commits behind head on release-1.0.

Additional details and impacted files

@@             Coverage Diff              @@
##           release-1.0    #2976   +/-   ##
============================================
  Coverage        48.82%   48.82%           
============================================
  Files              270      270           
  Lines            23957    23957           
============================================
  Hits             11696    11696           
  Misses           11630    11630           
  Partials           631      631           

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