Editorial: Mark CreateDateDurationRecord in RoundDuration as fallible

[anba]

Fixes #2235

[codecov]

Codecov Report

Merging #2283 (b0e77c8) into main (1b3d018) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #2283   +/-   ##
=======================================
  Coverage   91.06%   91.06%           
=======================================
  Files          19       19           
  Lines       10528    10528           
  Branches     1699     1699           
=======================================
  Hits         9587     9587           
  Misses        929      929           
  Partials       12       12           

Flag	Coverage Δ
test262	83.30% <ø> (ø)
tests	81.79% <ø> (ø)

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[ptomato]

Thanks!