Update getMapThumbnailFile documentation.

GitOrigin-RevId: 1cbd5ab983cfabdb0b1032ab4a66e2a671af3b8e

td/generate/scheme/td_api.tl

@@ -3292,7 +3292,7 @@ setStickerPositionInSet sticker:InputFile position:int32 = Ok;
 removeStickerFromSet sticker:InputFile = Ok;
 
 
-//@description Returns information about a file with a map thumbnail in PNG format @location Location of the map center @zoom Map zoom level; 13-20 @width Map width in pixels before applying scale; 16-1024 @height Map height in pixels before applying scale; 16-1024 @scale Map scale; 1-3 @chat_id Identifier of a chat, in which the thumbnail will be shown. Use 0 if unknown
+//@description Returns information about a file with a map thumbnail in PNG format. Only map thumbnail files with size less than 1MB can be downloaded @location Location of the map center @zoom Map zoom level; 13-20 @width Map width in pixels before applying scale; 16-1024 @height Map height in pixels before applying scale; 16-1024 @scale Map scale; 1-3 @chat_id Identifier of a chat, in which the thumbnail will be shown. Use 0 if unknown
 getMapThumbnailFile location:location zoom:int32 width:int32 height:int32 scale:int32 chat_id:int53 = File;