Update codecov/codecov-action action to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
codecov/codecov-action	action	major	v5 → v6

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Release Notes

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

v6

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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[yegor256]

@rultor please, try to merge, since 15 checks have passed

[rultor]

@rultor please, try to merge, since 15 checks have passed

@yegor256 OK, I'll try to merge now. You can check the progress of the merge here.

[rultor]

@rultor please, try to merge, since 15 checks have passed

@renovate[bot] @yegor256 Oops, I failed. You can see the full log here (spent 1hr).

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