Bump codecov/codecov-action from 4 to 5

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 4 to 5.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v4...v5)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/test.yaml

@@ -16,7 +16,7 @@ jobs:
       - uses: golangci/golangci-lint-action@v6
         with: { version: "latest" }
       - run: make cov
-      - uses: codecov/codecov-action@v4
+      - uses: codecov/codecov-action@v5
         env: { CODECOV_TOKEN: "${{ secrets.CODECOV_TOKEN }}" }
   test:
     strategy: