Update usage example

README.md

@@ -35,6 +35,10 @@ import { nodePolyfills } from 'vite-plugin-node-polyfills'
 export default defineConfig({
   plugins: [
     nodePolyfills({
+      // To exclude specific polyfills, add them to this list.
+      exclude: [
+        'fs', // Excludes the polyfill for `fs` and `node:fs`.
+      ],
       // Whether to polyfill `node:` protocol imports.
       protocolImports: true,
     }),