Update actions/setup-go action to v5

[renovate]

This PR contains the following updates:

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

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Release Notes

actions/setup-go (actions/setup-go)

v5

Compare Source

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Configuration

📅 Schedule: Branch creation - "every weekend" in timezone Asia/Tokyo, Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ 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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• If you want to rebase/retry this PR, check this box

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (01d4deb) 38.49% compared to head (c6a6611) 38.49%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #224   +/-   ##
=======================================
  Coverage   38.49%   38.49%           
=======================================
  Files           8        8           
  Lines        1626     1626           
=======================================
  Hits          626      626           
  Misses        964      964           
  Partials       36       36           

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