AETHER-2241 Bump K8S version to 1.20

Change-Id: Ibcd95906916bed29c75a8394bbe2b9a236c890b1
diff --git a/Makefile b/Makefile
index c686472..308a219 100644
--- a/Makefile
+++ b/Makefile
@@ -20,10 +20,10 @@
 ROC_4G_MODELS  ?= $(MAKEDIR)/roc-4g-models.json
 ROC_5G_MODELS  ?= $(MAKEDIR)/roc-5g-models.json
 
-KUBESPRAY_VERSION ?= release-2.14
-DOCKER_VERSION	?= 19.03
-K8S_VERSION	?= v1.18.9
-HELM_VERSION	?= v3.2.4
+KUBESPRAY_VERSION ?= release-2.17
+DOCKER_VERSION	?= '20.10'
+K8S_VERSION	?= v1.20.11
+HELM_VERSION	?= v3.6.3
 
 HELM_GLOBAL_ARGS ?=