Fixed Thai Calendar test case coverage

[PPsyrius]

Proposed change

The recent simultaneous merge of #2081 and #2086 reduces Thai Calendar test coverage as those changes removed testcases for the year 2158, this PR increased that test coverage back to 100% again.

Type of change

• New country/market holidays support (thank you!)
• Supported country/market holidays update (calendar discrepancy fix, localization)
• Existing code/documentation/test/process quality improvement (best practice, cleanup, refactoring, optimization)
• Dependency update (version deprecation/pin/upgrade)
• Bugfix (non-breaking change which fixes an issue)
• Breaking change (a code change causing existing functionality to break)
• New feature (new holidays functionality in general)

Checklist

• I've followed the contributing guidelines
• I've run make pre-commit, it didn't generate any changes
• I've run make test, all tests passed locally

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (abcffe3) to head (79516f2).
Report is 5 commits behind head on dev.

Additional details and impacted files

@@             Coverage Diff             @@
##              dev     #2090      +/-   ##
===========================================
+ Coverage   99.98%   100.00%   +0.01%     
===========================================
  Files         191       191              
  Lines       11537     11537              
  Branches     1738      1738              
===========================================
+ Hits        11535     11537       +2     
+ Misses          1         0       -1     
+ Partials        1         0       -1     

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[KJhellico]

LGTM.

[arkid15r]

💯