Prior to this patch, the Go version for the Windows tests in Github resolved to `1.15.15`[1]. With this patch, the Go version for the Windows tests is fixed to actually resolve to the latest version (^1.16), consistent to the other platforms. This patch also bumps `actions/setup-go`[2] to the latest version, consistent with the other platforms. [1]: https://github.com/kubernetes-csi/csi-driver-nfs/runs/4211323920?check_suite_focus=true [2]: https://github.com/actions/setup-go