[webhooks] unify examples

Author: capcom6

docs/features/webhooks.md

@@ -173,7 +173,7 @@ Your server will receive a POST request with a payload like:
         "simNumber": 1,
         "receivedAt": "2024-06-22T15:46:11.000+07:00"
       },
-      "webhookId": "<unique-id>"
+      "webhookId": "LreFUt-Z3sSq0JufY9uWB"
     }
     ```
 
@@ -190,7 +190,7 @@ Your server will receive a POST request with a payload like:
         "simNumber": 1,
         "receivedAt": "2024-06-22T15:46:11.000+07:00"
       },
-      "webhookId": "<unique-id>"
+      "webhookId": "LreFUt-Z3sSq0JufY9uWB"
     }
     ```
 
@@ -210,7 +210,7 @@ Your server will receive a POST request with a payload like:
         "contentClass": "IMAGE_BASIC",
         "receivedAt": "2025-08-23T05:15:30.000+07:00"
       },
-      "webhookId": "<unique-id>"
+      "webhookId": "LreFUt-Z3sSq0JufY9uWB"
     }
     ```
 

docs/getting-started/webhooks.md

@@ -38,8 +38,10 @@ Webhooks provide real-time notifications about SMS events. Follow these steps to
      "event": "sms:received",
      "id": "Ey6ECgOkVVFjz3CL48B8C",
      "payload": {
-       "textMessage": { "text": "Android is always a sweet treat!"},
+       "messageId": "abc123",
+       "message": "Android is always a sweet treat!",
        "phoneNumber": "6505551212",
+       "simNumber": 1,
        "receivedAt": "2024-06-22T15:46:11.000+07:00"
      },
      "webhookId": "LreFUt-Z3sSq0JufY9uWB"