Bump codecov/codecov-action from 4 to 5 (#16)

* 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]>

* Update ci.yml

---------

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Taichi Ishitani <[email protected]>

.github/workflows/ci.yml

@@ -57,10 +57,10 @@ jobs:
           bundle exec rake coverage
 
       - name: Upload coverage report
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@v5
         with:
           name: ${{ runner.os }}-${{ matrix.ruby }}-frozen_string_literal-${{ matrix.frozen_string_literal }}
-          file: ./coverage/coverage.xml
+          files: ./coverage/coverage.xml
           fail_ci_if_error: true
         env:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}