fix: export ChannelWebhook class

package.json

@@ -54,4 +54,4 @@
     "typed-emitter": "^2.1.0",
     "typescript": "^5.4.2"
   }
-}
+}

src/classes/index.ts

@@ -1,6 +1,7 @@
 export * from "./Bot";
 export * from "./Channel";
 export * from "./ChannelUnread";
+export * from "./ChannelWebhook";
 export * from "./Emoji";
 export * from "./File";
 export * from "./Invite";