chore(deps): 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: (in timezone Pacific/Auckland)

• Branch creation
  • Between 12:00 AM and 03:59 AM, on day 1 of the month (* 0-3 1 * *)
• 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-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.72%. Comparing base (314d9e0) to head (456f2b4).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #340   +/-   ##
=======================================
  Coverage   91.72%   91.72%           
=======================================
  Files           7        7           
  Lines         266      266           
  Branches       66       66           
=======================================
  Hits          244      244           
  Misses          3        3           
  Partials       19       19           

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