Add new version of Zigbee R23 add-on v1.3.0 (#108)

Zigbee R23 add-on v1.3.0 added.

Signed-off-by: Eduardo Montoya <eduardo.montoya@nordicsemi.no>

Author: edmont

index/nrfconnect.json

@@ -130,9 +130,15 @@
           "tag": "v1.2.1",
           "date": "2025-10-10T14:02:00Z",
           "sdk": "v2.9.2"
+        },
+        {
+          "name": "Zigbee add-on v1.3.0",
+          "tag": "v1.3.0",
+          "date": "2026-02-23T15:00:00Z",
+          "sdk": "v2.9.2"
         }
       ],
-      "defaultBranch": "v1.2.1",
+      "defaultBranch": "v1.3.0",
       "docsUrl": "https://docs.nordicsemi.com/bundle/addon-zigbee-r23-latest/page/index.html"
     },
     {