gif sticker support

docs/Reference.md

@@ -338,7 +338,7 @@ Discord uses ids and hashes to render images in the client. These hashes can be
 
 \*\*\* In the case of the Default User Avatar and Sticker endpoints, the size of images returned is constant with the "size" querystring parameter being ignored.
 
-\*\*\*\* In the case of the Sticker endpoint, the sticker will be available as PNG if its [`format_type`](#DOCS_RESOURCES_STICKER/sticker-object) is `PNG` or `APNG`, and as [Lottie](https://airbnb.io/lottie/#/) if its `format_type` is `LOTTIE`.
+\*\*\*\* In the case of the Sticker endpoint, the sticker will be available as PNG if its [`format_type`](#DOCS_RESOURCES_STICKER/sticker-object) is `PNG` or `APNG`, and as [Lottie](https://airbnb.io/lottie/#/) if its `format_type` is `LOTTIE`. It could also be available as a `GIF`.
 
 ## Image Data
 

docs/resources/Sticker.md

@@ -38,6 +38,7 @@ Incidentally the client will always use a name generated from an emoji as the va
 | PNG    | 1     |
 | APNG   | 2     |
 | LOTTIE | 3     |
+| GIF    | 4     |
 
 ###### Example Sticker
 
@@ -138,7 +139,7 @@ Every guilds has five free sticker slots by default, and each Boost level will g
 | name        | string        | name of the sticker (2-30 characters)                                                        |
 | description | string        | description of the sticker (empty or 2-100 characters)                                       |
 | tags        | string        | autocomplete/suggestion tags for the sticker (max 200 characters)                            |
-| file        | file contents | the sticker file to upload, must be a PNG, APNG, or Lottie JSON file, max 500 KB             |
+| file        | file contents | the sticker file to upload, must be a PNG, APNG, GIF, or Lottie JSON file, max 500 KB        |
 
 ## Modify Guild Sticker % PATCH /guilds/{guild.id#DOCS_RESOURCES_GUILD/guild-object}/stickers/{sticker.id#DOCS_RESOURCES_STICKER/sticker-object}