update boilerplate date

[dprotaso]

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[knative-prow-robot]

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[codecov]

Codecov Report

Merging #2134 (5365f27) into main (980a337) will decrease coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #2134      +/-   ##
==========================================
- Coverage   67.44%   67.40%   -0.05%     
==========================================
  Files         215      215              
  Lines        9117     9117              
==========================================
- Hits         6149     6145       -4     
- Misses       2695     2697       +2     
- Partials      273      275       +2     

Impacted Files	Coverage Δ
test/gcs/mock/mock.go	90.32% <0.00%> (-2.16%)	⬇️

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[n3wscott]

/lgtm