feat: expand environment variables in maintainer

[scop]

No description provided.

[codecov]

Codecov Report

Merging #463 (285912c) into main (b684867) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #463      +/-   ##
==========================================
+ Coverage   65.98%   66.00%   +0.01%     
==========================================
  Files          16       16              
  Lines        1908     1909       +1     
==========================================
+ Hits         1259     1260       +1     
  Misses        510      510              
  Partials      139      139              

Impacted Files	Coverage Δ
nfpm.go	86.50% <100.00%> (+0.06%)	⬆️

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[Felixoid]

I'd like to encourage this PR. Although we use static author, GIT parameters as author look very nice!

[djgilcrease]

Seems odd to me you would want your maintainer to potentially change with every commit, but other than that it looks fine to me.

[caarlos0]

Thanks!