Update GitHub Action versions in CI.yml

[abhro]

• actions/checkout version 4 to 5
• codecov/codecov-action verson 3 to 5

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.05%. Comparing base (4067267) to head (2fec572).
⚠️ Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #212      +/-   ##
==========================================
+ Coverage   84.93%   85.05%   +0.11%     
==========================================
  Files          15       15              
  Lines         697      689       -8     
==========================================
- Hits          592      586       -6     
+ Misses        105      103       -2     

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