refactor: Do not add .html extension to the URL

Author: d3xter666

packages/documentation/.vitepress/config.ts

@@ -16,7 +16,7 @@ export default defineConfig({
 
   description: "An open and modular toolchain to develop state-of-the-art applications based on the UI5 framework.",
   lastUpdated: false, // disable git author info
-  cleanUrls: false,
+  cleanUrls: true,
   ignoreDeadLinks: true,
 
   vue: {