fix: example app base path for gh pages deploy

Author: ndom91

example/vite.config.ts

@@ -3,6 +3,7 @@ import react from '@vitejs/plugin-react';
 
 // https://vitejs.dev/config/
 export default defineConfig({
+  base: '/react-timezone-select/',
   build: {
     rollupOptions: {
       input: ['index.html', 'src/App.tsx', 'src/index.tsx', 'src/Timezone.tsx'],