Fixed field name in GuildTemplate Interface (#505)

Replaced "user" field name with "creator".

Co-authored-by: ayntee <ayyantee@gmail.com>

src/types/guild.ts

@@ -683,7 +683,7 @@ export interface GuildTemplate {
   /** the ID of the user who created the template */
   "creator_id": string;
   /** the user who created the template */
-  user: UserPayload;
+  creator: UserPayload;
   /** when this template was created */
   "created_at": string;
   /** when this template was last synced to the source guild */