Fix docs of the Translation entity

The poll attribute is an object, not an array.

content/en/entities/Translation.md

@@ -20,7 +20,7 @@ Translation of status with content warning and media
   "spoiler_text": "Greatings ahead",
   "media_attachments": [
     {
-      "id": 22345792,
+      "id": "22345792",
       "description": "Status author waving at the camera"
     }
   ],
@@ -36,19 +36,17 @@ Translation of status with poll:
   "content": "<p>Should I stay or should I go?</p>",
   "spoiler_text": "",
   "media_attachments": [],
-  "poll": [
-    {
-      "id": 34858,
-      "options": [
-        {
-          "title": "Stay" 
-        },
-        {
-          "title": "Go"
-        }
-      ]
-    }
-  ],
+  "poll": {
+    "id": "34858",
+    "options": [
+      {
+        "title": "Stay" 
+      },
+      {
+        "title": "Go"
+      }
+    ]
+  },
   "detected_source_language": "ja",
   "provider": "DeepL.com"
 }
@@ -73,8 +71,8 @@ Translation of status with poll:
 
 ### `poll` {#poll}
 
-**Description:** The translated poll options of the status.\
-**Type:** Array\
+**Description:** The translated poll of the status.\
+**Type:** [Translation::Poll](#Poll)\
 **Version history:**\
 4.2.0 - added
 
@@ -99,8 +97,24 @@ Translation of status with poll:
 **Version history:**\
 4.0.0 - added
 
+## Translation::Poll attributes {#Poll}
+
+### `id` {#Poll-id}
+
+**Description:** The ID of the Poll.\
+**Type:** String (cast from an integer, but not guaranteed to be a number)\
+**Version history:**\
+4.2.0 - added
+
+### `options` {#Poll-options}
+
+**Description:** The translated poll options.\
+**Type:** Array\
+**Version history:**\
+4.2.0 - added
+
 ## See also
 
 {{< page-relref ref="methods/statuses#translate" caption="POST /api/v1/statuses/:id/translate" >}}
 
-{{< caption-link url="https://github.com/mastodon/mastodon/blob/main/app/serializers/rest/translation_serializer.rb" caption="app/serializers/rest/translation_serializer.rb" >}}
+{{< caption-link url="https://github.com/mastodon/mastodon/blob/main/app/serializers/rest/translation_serializer.rb" caption="app/serializers/rest/translation_serializer.rb" >}}