fix(setter): quote DNS record IDs to prevent injection attacks

[favonia]

Closes #496.

[codecov]

Codecov Report

Merging #502 (1b54ee6) into main (e87cc52) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #502   +/-   ##
=======================================
  Coverage   88.06%   88.06%           
=======================================
  Files          44       44           
  Lines        2262     2262           
=======================================
  Hits         1992     1992           
  Misses        260      260           
  Partials       10       10           

Flag	Coverage Δ
unittests	88.06% <100.00%> (ø)

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

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