Bump codecov/codecov-action from 2 to 5

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 2 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@v2...v5)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -170,7 +170,7 @@ jobs:
         run: python -m pytest tests/ --cov=./biosimulators_amici/ --cov-report=xml
 
       - name: Upload the coverage report to Codecov
-        uses: codecov/codecov-action@v2
+        uses: codecov/codecov-action@v5
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           flags: unittests