github-actions(deps): bump codecov/codecov-action from 3 to 5

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 3 to 5.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](https://github.com/codecov/codecov-action/compare/v3...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] <[email protected]>

.github/workflows/ci-cd.yml

@@ -85,7 +85,7 @@ jobs:
         pytest tests/ -v --cov=agentic_ai_system --cov-report=xml --cov-report=html
         
     - name: Upload coverage reports
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v5
       with:
         file: ./coverage.xml
         flags: unittests