issue/542: fix help link.

[staghouse]

• fix help us link to point to main
• add codecov reporting in release management gh action.

[codecov[bot]]

Codecov Report

:exclamation: No coverage uploaded for pull request base (main@d371fad). Click here to learn what that means. The diff coverage is n/a.

@@           Coverage Diff            @@
##             main      #543   +/-   ##
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  Coverage        ?   100.00%           
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  Files           ?         5           
  Lines           ?        71           
  Branches        ?        28           
========================================
  Hits            ?        71           
  Misses          ?         0           
  Partials        ?         0           

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