webhooks: update example responses to include custom_headers

Author: hollyabrams

official/docs/responses/webhooks/webhooks-create.json

@@ -4,5 +4,11 @@
   "mode": "test",
   "url": "http://example.com",
   "created_at": "2024-01-24T00:07:52Z",
-  "disabled_at": null
+  "disabled_at": null,
+  "custom_headers": [
+    {
+      "name": "X-Header-Name",
+      "value": "header_value"
+    }
+  ]
 }

official/docs/responses/webhooks/webhooks-list.json

@@ -6,7 +6,8 @@
       "mode": "test",
       "url": "http://example.com",
       "created_at": "2024-01-24T00:07:54Z",
-      "disabled_at": null
+      "disabled_at": null,
+      "custom_headers": []
     }
   ]
 }

official/docs/responses/webhooks/webhooks-retrieve.json

@@ -4,5 +4,6 @@
   "mode": "test",
   "url": "http://example.com",
   "created_at": "2024-01-24T00:07:53Z",
-  "disabled_at": null
+  "disabled_at": null,
+  "custom_headers": []
 }

official/docs/responses/webhooks/webhooks-update.json

@@ -4,5 +4,11 @@
   "mode": "test",
   "url": "http://example.com",
   "created_at": "2024-01-24T00:07:56Z",
-  "disabled_at": null
+  "disabled_at": null,
+  "custom_headers": [
+    {
+      "name": "X-Header-Name",
+      "value": "header_value"
+    }
+  ]
 }