refactor: use dotenv/config instead of calling the function manually (#4258)

Signed-off-by: Seren_Modz 21 <seren@kings-world.net>

website/docs/examples/node.md

@@ -21,11 +21,9 @@ After you installed the `@discordeno/bot` package with npm, yarn, pnpm or bun yo
 This is how you can use it to create a bot that logs into discord:
 
 ```ts
-import dotenv from 'dotenv'
+import 'dotenv/config'
 import { createBot } from '@discordeno/bot'
 
-dotenv.config()
-
 const bot = createBot({
   token: process.env.token,
   events: {