Broken codecov uploading

[wuhuizuo]

tidb-operator/.github/workflows/ci.yaml

Lines 70 to 75 in 9c48ee5

	- name: Upload test coverage
	uses: codecov/codecov-action@v1
	with:
	flags: unittest
	working-directory: ${{ github.workspace }}/go/src/github.com/${{ github.repository }}
	if: ${{ matrix.job == 'test' }}

Currently. It made the codecov branch coverage broken: