Print the correct workflow link in issue body

[ArthurSens]

An oversight while working on #720. It turns out I forgot to update one place.

We noticed while rolling out the automation in the contrib repository: open-telemetry/opentelemetry-collector-contrib#39585

cc @mx-psi

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 54.02%. Comparing base (87002d6) to head (22a75f8).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
issuegenerator/main.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #840   +/-   ##
=======================================
  Coverage   54.02%   54.02%           
=======================================
  Files          62       62           
  Lines        3802     3802           
=======================================
  Hits         2054     2054           
  Misses       1553     1553           
  Partials      195      195           

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