Chores: codecov action fails the workflow execution

[athril]

When making a pull_request, an automated workflow (CI.yml) is automatically failed due to codecov upload error, not related to the submitted code.

Error: Error uploading to [https://codecov.io:](https://codecov.io/) Error: There was an error fetching the storage URL during POST: 429 - {'detail': ErrorDetail(string='Rate limit reached. Please upload with the Codecov repository upload token to resolve issue. Expected time to availability: 3047s.', code='throttled')}
(...)
Error: Codecov: Failed to properly upload: The process '/home/runner/work/_actions/codecov/codecov-action/v3/dist/codecov' failed with exit code 255