fix(api): remove all trailing dots

[favonia]

Current it only removes one trailing dot.

[codecov]

Codecov Report

Merging #95 (3ec9076) into main (342b7e8) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main      #95   +/-   ##
=======================================
  Coverage   77.90%   77.90%           
=======================================
  Files          22       22           
  Lines        1172     1172           
=======================================
  Hits          913      913           
  Misses        255      255           
  Partials        4        4           

Flag	Coverage Δ
unittests	77.90% <100.00%> (ø)

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Impacted Files	Coverage Δ
internal/api/fqdn.go	100.00% <100.00%> (ø)

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