update cri-api comments for Windows HostProcess withdrawal

Author: marosset

staging/src/k8s.io/cri-api/pkg/apis/runtime/v1/api.pb.go

@@ -1011,7 +1011,7 @@ message LinuxContainerUser {
 // WindowsNamespaceOption provides options for Windows namespaces.
 message WindowsNamespaceOption {
     // Network namespace for this container/sandbox.
-    // Namespaces currently set by the kubelet: POD, NODE
+    // This is currently never set by the kubelet
     NamespaceMode network = 1;
 }