docs: add more info about IIFE standalone demo

Author: ghiscoding

packages/excel-builder-vanilla/README.md

@@ -16,7 +16,7 @@ npm install excel-builder-vanilla
 
 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
+2. CJS: CommonJS to support old Node `require()` - will possibly be removed in the future
 3. IIFE: standalone script with `ExcelBuilder` available on the `window` object
 
 ```ts