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

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v5 → v6

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Release Notes

actions/checkout (actions/checkout)

v6

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 91.13%. Comparing base (8baaa1d) to head (5625a77).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1862   +/-   ##
=======================================
  Coverage   91.13%   91.13%           
=======================================
  Files         349      349           
  Lines        5807     5807           
  Branches     1335     1373   +38     
=======================================
  Hits         5292     5292           
+ Misses        498      496    -2     
- Partials       17       19    +2     

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