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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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.27%. Comparing base (902a587) to head (99a48b6).
⚠️ Report is 1 commits behind head on v2.x.

Additional details and impacted files

@@           Coverage Diff           @@
##             v2.x     #216   +/-   ##
=======================================
  Coverage   92.27%   92.27%           
=======================================
  Files           1        1           
  Lines         207      207           
=======================================
  Hits          191      191           
  Misses         11       11           
  Partials        5        5           

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