fix(locales): properly name Slovak file

[arthurdenner]

What kind of change does this PR introduce?

Bugfix. There's a typo in the sk-SK locale file.

What is the current behavior?
The file isn't loaded.

What is the new behavior?
The file is loaded correctly.

Checklist:

• Documentation
• Tests
• Ready to be merged

[vercel]

This pull request is being automatically deployed with Vercel (learn more).
To see the status of your deployment, click below or on the icon next to each commit.

🔍 Inspect: https://vercel.com/arthurdenner/react-semantic-ui-datepickers/4z8BKm4pZf82cPtWGKyC2vdfn7pi
✅ Preview: https://react-semantic-ui-datepickers-git-fix-slova-f8bbcc-arthurdenner.vercel.app

[codecov]

Codecov Report

Merging #710 (74a73e2) into develop (a58a8a6) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #710   +/-   ##
========================================
  Coverage    95.41%   95.41%           
========================================
  Files           16       16           
  Lines          523      523           
  Branches       102      102           
========================================
  Hits           499      499           
  Misses          24       24           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update a58a8a6...74a73e2. Read the comment docs.

[github-actions]

🎉 This PR is included in version 2.16.1 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀