docs: update latest gzip build size because of new ESM-Only

Author: ghiscoding

README.md

@@ -20,7 +20,7 @@ This lib allows you to build and write an Excel file dynamically, it does **not*
 
 ### Comparison to similar libraries
 
-Excel-buider-vanilla is at the minimum 6x times smaller than the most popular libraries (we used `Bundlephobia` to compare), excel-builder-vanilla is 22Kb gzip while [XLSX](https://bundlephobia.com/package/xlsx) is 136Kb and [ExcelJS](https://bundlephobia.com/package/exceljs) is 251Kb gzip. The reason as to why it's much smaller is simple and relates to 2 major differences: 
+Excel-buider-vanilla is at the minimum 6x times smaller than the most popular libraries (we used `Bundlephobia` to compare), excel-builder-vanilla is 16.5Kb gzip while [XLSX](https://bundlephobia.com/package/xlsx) is 136Kb and [ExcelJS](https://bundlephobia.com/package/exceljs) is 251Kb gzip. The reason as to why it's much smaller is simple and relates to 2 major differences: 
 - excel-builder-vanilla is ESM-Only and all other libraries are only offering CJS (CommonJS) increasing their download/install size
 - excel-builder-vanilla only offers Excel export (writing) but without any reading capabilities