chore: update readme

Author: antfu

packages/self-inspect/README.md

@@ -20,14 +20,13 @@ pnpm add -D @vitejs/devtools-self-inspect
 Add the plugin to your Vite config:
 
 ```ts
-import DevTools from '@vitejs/devtools'
 import { DevToolsSelfInspect } from '@vitejs/devtools-self-inspect'
 // vite.config.ts
 import { defineConfig } from 'vite'
 
 export default defineConfig({
+  devtools: true,
   plugins: [
-    DevTools(),
     DevToolsSelfInspect(),
   ],
 })