feat(config): re-enable UPDATE_TIMEOUT

[favonia]

No description provided.

[codecov]

Codecov Report

Merging #72 (9a8d9b9) into main (045ca24) will increase coverage by 0.09%.
The diff coverage is 90.00%.

@@            Coverage Diff             @@
##             main      #72      +/-   ##
==========================================
+ Coverage   77.80%   77.90%   +0.09%     
==========================================
  Files          22       22              
  Lines        1167     1172       +5     
==========================================
+ Hits          908      913       +5     
  Misses        255      255              
  Partials        4        4              

Flag	Coverage Δ
unittests	77.90% <90.00%> (+0.09%)	⬆️

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Impacted Files	Coverage Δ
cmd/ddns.go	0.00% <0.00%> (ø)
internal/config/config.go	98.42% <100.00%> (+0.04%)	⬆️

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