chore: use CDN for standalone script IIFE demo

Author: ghiscoding

README.md

@@ -54,7 +54,7 @@ import { createWorksheet } from 'excel-builder-vanilla';
 const { createWorksheet } = require('excel-builder-vanilla');
 
 // IIFE - CDN
-<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/excel-builder.cjs"></script>
+<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/excel-builder.iife.js"></script>
 ```
 
 ## Changelog

packages/demo/src/examples/example-standalone-iife.html

@@ -65,7 +65,7 @@ <h5>Standalone JS (IIFE)</h5>
 
     <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.min.js"></script>
     <script src="https://cdn.jsdelivr.net/npm/[email protected]/umd/index.js"></script>
-    <script src="../../../excel-builder-vanilla/dist/excel-builder.iife.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/excel-builder-vanilla@3.0.0/dist/excel-builder.iife.js"></script>
 
     <script>
       function downloader(options) {

packages/excel-builder-vanilla/README.md

@@ -18,7 +18,7 @@ The project offers 3 different bundle types, choose the best for your use case
 1. ESM: to `import from` (prefered)
 2. CJS: CommonJS to support old Node `require()`... might be removed in the future
 3. IIFE: standalone script with `ExcelBuilder` available on the `window` object
-  
+
 ```ts
 // ESM - npm install
 import { createWorksheet } from 'excel-builder-vanilla';
@@ -27,7 +27,7 @@ import { createWorksheet } from 'excel-builder-vanilla';
 const { createWorksheet } = require('excel-builder-vanilla');
 
 // IIFE - CDN
-<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/excel-builder.cjs"></script>
+<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/excel-builder.iife.js"></script>
 ```
 
 ## Changelog