ucentral-schema: update metric example

Signed-off-by: John Crispin <john@phrozen.org>

feeds/ucentral/ucentral-schema/files/etc/ucentral/examples/metrics.json

@@ -1,5 +1,14 @@
 {
 	"uuid": 2,
+	"radios": [
+		{
+			"band": "2G",
+			"country": "CA",
+			"channel-mode": "HE",
+			"channel-width": 80,
+			"channel": 32
+		}
+	],
 	"interfaces": [
 		{
 			"name": "WAN",
@@ -34,7 +43,21 @@
 					"lease-count": 100,
 					"lease-time": "6h"
 				}
-			}
+			},
+			"ssids": [
+				{
+					"name": "Metric",
+					"wifi-bands": [
+						"2G"
+					],
+					"bss-mode": "ap",
+					"encryption": {
+						"proto": "psk2",
+						"key": "OpenWifi",
+						"ieee80211w": "optional"
+					}
+				}
+			]
 		}
 	],
 	"metrics": {