docs: update vue-cli/webpack/rspack require usage (#843)

Author: YunYouJun

README.md

@@ -73,7 +73,7 @@ export default {
 module.exports = {
   /* ... */
   plugins: [
-    require('unplugin-vue-components/webpack').default({ /* options */ }),
+    require('unplugin-vue-components/webpack')({ /* options */ }),
   ],
 }
 ```
@@ -88,7 +88,7 @@ module.exports = {
 module.exports = {
   /* ... */
   plugins: [
-    require('unplugin-vue-components/rspack').default({ /* options */ }),
+    require('unplugin-vue-components/rspack')({ /* options */ }),
   ],
 }
 ```
@@ -110,7 +110,7 @@ You might not need this plugin for Nuxt. Use [`@nuxt/components`](https://github
 module.exports = {
   /* ... */
   plugins: [
-    require('unplugin-vue-components/webpack').default({ /* options */ }),
+    require('unplugin-vue-components/webpack')({ /* options */ }),
   ],
 }
 ```