Merge pull request kubernetes#2549 from neolit123/1.21-update-instrumentation-kep-exclude-kubectl-kubeadm

1602-structured-logging: add note about excluded components

Author: k8s-ci-robot

keps/sig-instrumentation/1602-structured-logging/README.md

@@ -369,6 +369,8 @@ Klog interface was selected as it is already supported by klog.v2 with `SetLogge
 
 ### Migration / Graduation Criteria
 
+NOTE: The components kubectl and kubeadm are out of scope for this migration effort until further notice.
+
 #### Alpha
 
 Introduce structured logging and JSON format: