Fix pluralization in streak length translation

[turfle]

This pull request makes a minor update to the Ukrainian translation file to correct the plural forms used in the streak length string.

• Fixed the plural forms for the word "урок" in the streakList.streakLength translation to use the correct Ukrainian forms for counts 2, 3, and 4.

[semanticdiff-com]

Review changes with  

Changed Files

File	Status
packages/keybr-intl/translations/uk.json	89% smaller