chore: use codecov/codecov-action@v3 in Go workflow

[d--j]

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[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (main@997fc1e). Click here to learn what that means.
Patch has no changes to coverable lines.

❗ Current head 272afa6 differs from pull request most recent head 2242e9e. Consider uploading reports for the commit 2242e9e to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main       #1   +/-   ##
=======================================
  Coverage        ?   94.11%           
=======================================
  Files           ?        3           
  Lines           ?      170           
  Branches        ?        0           
=======================================
  Hits            ?      160           
  Misses          ?        5           
  Partials        ?        5           

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