fix: switch to v4-beta

Author: thomasrockhu-codecov

.github/workflows/ci.yml

@@ -15,6 +15,6 @@ jobs:
  - name: Run tests and collect coverage
  run: pytest --cov app
  - name: Upload coverage to Codecov
- uses: codecov/codecov-action@v4-beta-beta-beta-beta
+ uses: codecov/codecov-action@v4-beta
  env:
  CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}