fix(demo): fix add-nav scroll to selected sections

[EvilAlexei]

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• read and followed the CONTRIBUTING.md guide.
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[codecov]

Codecov Report

Merging #3593 into development will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff              @@
##           development    #3593   +/-   ##
============================================
  Coverage        72.07%   72.07%           
============================================
  Files              251      251           
  Lines             8142     8142           
  Branches          1544     1544           
============================================
  Hits              5868     5868           
  Misses            1851     1851           
  Partials           423      423

Impacted Files	Coverage Δ
src/chronos/i18n/uk.ts	78.04% <0%> (-2.44%)	⬇️
src/chronos/i18n/pl.ts	75% <0%> (+2.77%)	⬆️

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