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 - "before 4am on the first day of the month" (UTC), 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 (1a94f43) 94.49% compared to head (681aef1) 94.49%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #328   +/-   ##
=======================================
  Coverage   94.49%   94.49%           
=======================================
  Files          36       36           
  Lines         962      962           
=======================================
  Hits          909      909           
  Misses         53       53           

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