Release 1.6.1

[nginx-bot]

This automated PR updates all the necessary files for 1.6.1 release.

[github-actions]

✅ Deploy Preview will be available once build job completes!

Name	Link
😎 Deploy Preview	https://frontdoor-test-docs.nginx.com/previews/nginx-gateway-fabric/3103/

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.95%. Comparing base (c344f5b) to head (eaa8d54).
Report is 1 commits behind head on release-1.6.

Additional details and impacted files

@@             Coverage Diff              @@
##           release-1.6    #3103   +/-   ##
============================================
  Coverage        89.95%   89.95%           
============================================
  Files              111      111           
  Lines            11453    11453           
  Branches            50       50           
============================================
  Hits             10303    10303           
  Misses            1089     1089           
  Partials            61       61           

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