Update codecov/codecov-action action to v4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
codecov/codecov-action	action	major	v3 -> v4

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Release Notes

codecov/codecov-action (codecov/codecov-action)

v4

Compare Source

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), 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 (6f828de) 97.06% compared to head (e0304c3) 97.06%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #277   +/-   ##
=======================================
  Coverage   97.06%   97.06%           
=======================================
  Files          47       47           
  Lines        2832     2832           
=======================================
  Hits         2749     2749           
  Misses         83       83           

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