feat(README): update README

apps/infra/data/postgresql-ha/helmchart.yaml

@@ -29,7 +29,7 @@ spec:
                 topologyKey: topology.kubernetes.io/region
               weight: 1
       tolerations:
-        - key: "node-role.kubernetes.io/master"
+        - key: "node-role.kubernetes.io/control-plane"
           operator: "Exists"
           effect: "NoSchedule"
       image:
@@ -66,7 +66,7 @@ spec:
                 topologyKey: kubernetes.io/hostname
               weight: 1
       tolerations:
-        - key: "node-role.kubernetes.io/master"
+        - key: "node-role.kubernetes.io/control-plane"
           operator: "Exists"
           effect: "NoSchedule"
       replicaCount: 1