example: fix Svelte dev mode (#4025)

examples/svelte-example/package.json

@@ -3,6 +3,7 @@
   "version": "0.0.0",
   "scripts": {
     "build": "rollup -c",
+    "serve": "sirv public",
     "start:client": "rollup -c -w",
     "start:server": "node ./server.mjs",
     "start": "npm-run-all --parallel start:client start:server",

examples/svelte-example/rollup.config.js

@@ -19,7 +19,7 @@ function serve () {
   return {
     writeBundle () {
       if (server) return
-      server = require('node:child_process').spawn('npm', ['run', 'start', '--', '--dev'], {
+      server = require('node:child_process').spawn('npm', ['run', 'serve', '--', '--dev'], {
         stdio: ['ignore', 'inherit', 'inherit'],
         shell: true,
       })