change function name from hightlight to highlight

[5earle]

PR Checklist

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• read and followed the CONTRIBUTING.md guide.
• built and tested the changes locally.
• added/updated tests.
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[5earle]

Addresses #3518

[codecov]

Codecov Report

Merging #4091 into development will decrease coverage by 0.03%.
The diff coverage is 100%.

@@               Coverage Diff               @@
##           development    #4091      +/-   ##
===============================================
- Coverage        72.23%   72.19%   -0.04%     
===============================================
  Files              252      252              
  Lines             8237     8237              
  Branches          1565     1565              
===============================================
- Hits              5950     5947       -3     
- Misses            1866     1868       +2     
- Partials           421      422       +1

Impacted Files	Coverage Δ
src/typeahead/typeahead-container.component.ts	82.11% <100%> (ø)	⬆️
src/chronos/i18n/pl.ts	69.44% <0%> (-8.34%)	⬇️

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[valorkin]

I never was able to pronounce this word correctly :)