Update docs/interactions/Message_Components.md

Author: Lulalaby

docs/interactions/Message_Components.md

@@ -1091,9 +1091,9 @@ Upon resolving by discord, it returns the full object, including metadata about
 
 | Field         | Type    | Description                                                                                                         |
 |---------------|---------|---------------------------------------------------------------------------------------------------------------------|
-| url           | string  | source url of media item (only supports http(s) and attachments)                                                    |
-| proxy_url     | string  | a proxied url of the media item                                                                                     |
-| height        | integer | height of media item                                                                                                |
-| width         | integer | width of media item                                                                                                 |
-| content_type  | string  | the media item's [media type](https://en.wikipedia.org/wiki/Media_type)                                             |
-| loading_state | integer | [loading state](#DOCS_INTERACTIONS_MESSAGE_COMPONENTS/unfurled-media-item-object-unfurled-media-item-loading-state) |
+| url           | string   | source url of media item (only supports http(s) and attachments)                                                    |
+| proxy_url     | ?string  | a proxied url of the media item                                                                                     |
+| height        | ?integer | height of media item                                                                                                |
+| width         | ?integer | width of media item                                                                                                 |
+| content_type  | ?string  | the media item's [media type](https://en.wikipedia.org/wiki/Media_type)                                             |
+| loading_state | ?integer | [loading state](#DOCS_INTERACTIONS_MESSAGE_COMPONENTS/unfurled-media-item-object-unfurled-media-item-loading-state) |