Fix typo in kubernetes upgrade pipeline

- kubernetes.master.addons -> kubernetes.master.kube-addons

Change-Id: I494d799efccaf5f7572a574b7295c8466a15f0df
Related-PROD: PROD-23658
diff --git a/k8s-upgrade-pipeline.groovy b/k8s-upgrade-pipeline.groovy
index c8e2d06..530a256 100644
--- a/k8s-upgrade-pipeline.groovy
+++ b/k8s-upgrade-pipeline.groovy
@@ -94,7 +94,7 @@
     def salt = new com.mirantis.mk.Salt()
 
     stage("Upgrading Addons at ${target}") {
-        salt.enforceState(pepperEnv, target, "kubernetes.master.addons")
+        salt.enforceState(pepperEnv, target, "kubernetes.master.kube-addons")
         salt.enforceState(pepperEnv, target, "kubernetes.master.setup")
     }
 }