link to image data reference

Author: appellation

docs/resources/guild.mdx

@@ -1015,12 +1015,12 @@ This endpoint supports the `X-Audit-Log-Reason` header.
 
 ###### JSON Params
 
-| Field   | Type    | Description                          | Permission      |
-|---------|---------|--------------------------------------|-----------------|
-| nick?   | ?string | value to set user's nickname to      | CHANGE_NICKNAME |
-| banner? | ?string | data URI base64 encoded banner image |                 |
-| avatar? | ?string | data URI base64 encoded avatar image |                 |
-| bio?    | ?string | guild member bio                     |                 |
+| Field   | Type    | Description                                                        | Permission      |
+|---------|---------|--------------------------------------------------------------------|-----------------|
+| nick?   | ?string | value to set user's nickname to                                    | CHANGE_NICKNAME |
+| banner? | ?string | [data URI base64 encoded](/docs/reference#image-data) banner image |                 |
+| avatar? | ?string | [data URI base64 encoded](/docs/reference#image-data) avatar image |                 |
+| bio?    | ?string | guild member bio                                                   |                 |
 
 ## Modify Current User Nick
 <Route method="PATCH">/guilds/[\{guild.id\}](/docs/resources/guild#guild-object)/members/@me/nick</Route>