Update actions/checkout action to v5

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v4 -> v5

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Release Notes

actions/checkout (actions/checkout)

v5

Compare Source

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

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♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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Config source: https://github.com/Slamdunk/.github/blob/main/renovate-config.json

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 37.31%. Comparing base (a20d406) to head (2aeec80).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master      #86   +/-   ##
=========================================
  Coverage     37.31%   37.31%           
  Complexity      101      101           
=========================================
  Files            23       23           
  Lines           268      268           
=========================================
  Hits            100      100           
  Misses          168      168           

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