ci: set workflow_dispatch event

[crazy-max]

this is for manual testing from fork.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

❗ No coverage uploaded for pull request base (master@b847aa4). Click here to learn what that means.

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Additional details and impacted files

@@            Coverage Diff            @@
##             master     #185   +/-   ##
=========================================
  Coverage          ?   62.09%           
=========================================
  Files             ?       35           
  Lines             ?     2266           
  Branches          ?        0           
=========================================
  Hits              ?     1407           
  Misses            ?      604           
  Partials          ?      255           

Flag	Coverage Δ
go-1.20	62.09% <ø> (?)
go-1.21	62.09% <ø> (?)
noroot	62.94% <ø> (?)
root	64.34% <ø> (?)
unit	62.09% <ø> (?)

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