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] <support@github.com>

.github/workflows/tests.yaml

@@ -81,7 +81,7 @@ jobs:
         run: |
           coverage combine coverage-linux*/.coverage
           coverage xml -o coverage-linux.xml
-      - uses: codecov/codecov-action@v4
+      - uses: codecov/codecov-action@v5
         with:
           fail_ci_if_error: true
           verbose: true
@@ -92,7 +92,7 @@ jobs:
         run: |
           coverage combine coverage-windows*/.coverage
           coverage xml -o coverage-windows.xml
-      - uses: codecov/codecov-action@v4
+      - uses: codecov/codecov-action@v5
         with:
           fail_ci_if_error: true
           verbose: true