Update Consul ACL example

Fixes #5831

website/source/docs/configuration/storage/consul.html.md

@@ -175,6 +175,40 @@ the following will work for most use-cases, assuming that your service name is
 }
 ```
 
+For Consul 1.4+, the following example takes into account the changed ACL
+language:
+
+```json
+{
+  "key_prefix": {
+    "vault/": {
+      "policy": "write"
+    }
+  },
+  "node_prefix": {
+    "": {
+      "policy": "write"
+    }
+  },
+  "service": {
+    "vault": {
+      "policy": "write"
+    }
+  },
+  "agent_prefix": {
+    "": {
+      "policy": "write"
+    }
+
+  },
+  "session_prefix": {
+    "": {
+      "policy": "write"
+    }
+  }
+}
+```
+
 ## `consul` Examples
 
 ### Local Agent