chore: display Go version used to build

[ldez]

$ go run ./cmd/sloglint/ -V
sloglint version dev linux/amd64 (built with go1.23.6)

Related to #62 (comment)

[codecov]

Codecov Report

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

Project coverage is 84.24%. Comparing base (8307697) to head (7c53c56).
Report is 9 commits behind head on main.

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

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #70      +/-   ##
==========================================
+ Coverage   83.58%   84.24%   +0.66%     
==========================================
  Files           2        2              
  Lines         262      273      +11     
==========================================
+ Hits          219      230      +11     
  Misses         35       35              
  Partials        8        8              

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