(IAC-438) Increase default node count and size for minimal cluster config

Author: dhoucgitter

examples/sample-input-minimal.tfvars

@@ -33,9 +33,9 @@ container_registry_admin_enabled    = false
 
 # AKS config
 kubernetes_version         = "1.23.8"
-default_nodepool_min_nodes = 1
+default_nodepool_min_nodes = 2
+default_nodepool_vm_type   = "Standard_D8s_v4"
 #v3 still has local temp storage
-default_nodepool_vm_type   = "Standard_D2_v3"
 
 # AKS Node Pools config - minimal
 cluster_node_pool_mode = "minimal"