[Magic Firewall] MFW-35: Set phase field in POST request example (cloudflare#354)

Co-authored-by: Jordan Griege <[email protected]>

Author: player-two

products/magic-transit/src/content/magic-firewall/adding-rules.md

@@ -47,6 +47,7 @@ curl -X POST https://api.cloudflare.com/client/v4/accounts/${account_id}/ruleset
   "name": "Example ruleset",
   "kind": "root",
   "description": "Example ruleset description",
+  "phase": "magic_transit",
   "rules": [
     {
       "action": "block",
@@ -61,17 +62,27 @@ Example response:
 
 ```
 {
-  "result": [
-    {
-      "id": "4376358e00ec4c42b0450b1afed120bf",
-      "name": "Example ruleset",
-      "description": "Example ruleset description",
-      "kind": "root",
-      "version": "1",
-      "last_updated": "2020-10-21T20:25:35.473609Z",
-      "phase": "magic_transit"
-    }
-  ],
+  "result": {
+    "id": "4376358e00ec4c42b0450b1afed120bf",
+    "name": "Example ruleset",
+    "description": "Example ruleset description",
+    "kind": "root",
+    "version": "1",
+    "rules": [
+      {
+        "id": "02ad6deb502c4f82b7a2531e878ac003",
+        "version": "1",
+        "action": "block",
+        "expression": "ip.src == 172.16.0.7",
+        "description": "Block IP 172.16.0.7"
+        "last_updated": "2020-10-21T20:25:35.473609Z",
+        "ref": "02ad6deb502c4f82b7a2531e878ac003",
+        "enabled": true
+      }
+    ],
+    "last_updated": "2020-10-21T20:25:35.473609Z",
+    "phase": "magic_transit"
+  },
   "success": true,
   "errors": [],
   "messages": []