ci(workflow): update codecov/codecov-action@v3

[erisu]

Motivation and Context

Use relaxed version of codecov/codecov-action to fetch latest minors and patch fixes.

Description

Replace strict version with codecov/codecov-action@v3

Testing

n/a

Checklist

• I've run the tests to see all new and existing tests pass
• I added automated test coverage as appropriate for this change
• If this Pull Request resolves an issue, I linked to the issue in the text above (and used the correct keyword to close issues using keywords)
• I've updated the documentation if necessary