Updated the manifests of knative eventing 1.15.4

[houshengbo]

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[knative-prow]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.88%. Comparing base (b39924a) to head (2344f8e).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1934   +/-   ##
=======================================
  Coverage   63.88%   63.88%           
=======================================
  Files          54       54           
  Lines        2622     2622           
=======================================
  Hits         1675     1675           
  Misses        830      830           
  Partials      117      117           

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