Merge pull request #36753 from deads2k/cli-08-fix-watch

Automatic merge from submit-queue

let printer update unstructured list

Fixes https://github.com/kubernetes/kubernetes/issues/36749.

Didn't see any existing test in `test-cmd.sh` and I'm not sure how to make the watch stop in the test for reasonable testing.

@kubernetes/kubectl @kargakis

pkg/kubectl/resource_printer.go

@@ -2318,7 +2318,7 @@ func (h *HumanReadablePrinter) PrintObj(obj runtime.Object, output io.Writer) er
 	// check if the object is unstructured.  If so, let's attempt to convert it to a type we can understand before
 	// trying to print, since the printers are keyed by type.  This is extremely expensive.
 	switch obj.(type) {
-	case *runtime.Unstructured, *runtime.Unknown:
+	case *runtime.UnstructuredList, *runtime.Unstructured, *runtime.Unknown:
 		if objBytes, err := runtime.Encode(api.Codecs.LegacyCodec(), obj); err == nil {
 			if decodedObj, err := runtime.Decode(api.Codecs.UniversalDecoder(), objBytes); err == nil {
 				obj = decodedObj