docs: update configuration docs (#827)

Author: selemondev

docs/content/1.getting-started/2.configuration.md

@@ -7,12 +7,12 @@ description: Configure Nuxt Tailwind with the `tailwindcss` property.
 export default {
   // Defaults options
   tailwindcss: {
-    cssPath: '~/assets/css/tailwind.css',
+    cssPath: ['~/assets/css/tailwind.css', { injectPosition: "first" }],
     configPath: 'tailwind.config',
-    exposeConfig: false,
-    exposeLevel: 2,
+    exposeConfig: {
+      level: 2
+    },
     config: {},
-    injectPosition: 'first',
     viewer: true,
   }
 }