⬆️ Update codecov/codecov-action action to v5 (#267)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[codecov/codecov-action](https://redirect.github.com/codecov/codecov-action)
| action | major | `v4` -> `v5` |

---

### Release Notes

<details>
<summary>codecov/codecov-action (codecov/codecov-action)</summary>

###
[`v5`](https://redirect.github.com/codecov/codecov-action/compare/v4...v5)

[Compare
Source](https://redirect.github.com/codecov/codecov-action/compare/v4...v5)

</details>

---

### Configuration

📅 **Schedule**: Branch creation - "before 4am on Monday" in timezone
Europe/Berlin, Automerge - At any time (no schedule defined).

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

♻ **Rebasing**: Whenever PR is behind base branch, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

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.github/workflows/test.yml

@@ -20,7 +20,7 @@ jobs:
         run: |
           npm run all
       - name: Upload coverage reports to Codecov
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@v5
   test: # make sure the action works on a clean machine without building
     strategy:
       matrix: