Bump codecov/codecov-action from v1.2.0 to v1.2.1

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from v1.2.0 to v1.2.1.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/master/CHANGELOG.md)
- [Commits](codecov/codecov-action@v1.2.0...e156083)

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/push.yml

@@ -42,7 +42,7 @@ jobs:
         GO111MODULE: 'on'
       run: go test -v -race -cover -covermode=atomic -coverprofile=coverage.txt ./...
     - name: Upload coverage report to Codecov
-      uses: codecov/codecov-action@v1.2.0
+      uses: codecov/codecov-action@v1.2.1
       with:
         flags: go${{ matrix.go-version }}
         token: ${{secrets.CODECOV_TOKEN}}