chore(deps): update actions/checkout action to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v4 → v6

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Release Notes

actions/checkout (actions/checkout)

v6

Compare Source

v5

Compare Source

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Configuration

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.62%. Comparing base (d2bfc2a) to head (0030445).

@@            Coverage Diff             @@
##             main     #216      +/-   ##
==========================================
- Coverage   80.74%   80.62%   -0.13%     
==========================================
  Files          26       26              
  Lines        2462     2462              
==========================================
- Hits         1988     1985       -3     
- Misses        474      477       +3     

see 1 file with indirect coverage changes

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