fix: govulncheck calls on C code

[another-rex]

Fix CGO and govulncheck not working well together. govulncheck does not work on C code anyway, so disabling CGO doesn't change any capabilities.

Fixes #1220

[another-rex]

Actually, a better solution would be to set CGO_ENABLED=0 just before calling govulncheck itself in the code. I'll make that change.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.65%. Comparing base (0bcec56) to head (e2f771c).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1228      +/-   ##
==========================================
- Coverage   67.65%   67.65%   -0.01%     
==========================================
  Files         174      174              
  Lines       16719    16721       +2     
==========================================
+ Hits        11312    11313       +1     
- Misses       4776     4777       +1     
  Partials      631      631              

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