Add if conditional in example for linux

README.md

@@ -53,6 +53,7 @@ jobs:
         pip install pytest-cov
         pytest --cov=./ --cov-report=xml
     - name: Upload coverage to Codecov
+      if: runner.os == 'Linux'
       uses: codecov/codecov-action@v1.0.3
       with:
         token: ${{secrets.CODECOV_TOKEN}}