docs(llms.txt): add more description

Author: SoonIter

website/rspress.config.ts

@@ -12,7 +12,7 @@ export default defineConfig({
   base: '/',
   title: 'Rslib',
   description:
-    'Rslib is a library development tool that leverages the well-designed configurations and plugins of Rsbuild, empowering library developers to take advantage of the extensive knowledge and ecosystem of webpack and Rspack.',
+    'Rslib is a library development tool that leverages the well-designed configurations and plugins of Rsbuild.',
   icon: 'https://assets.rspack.dev/rslib/rslib-logo-192x192.png',
   logo: 'https://assets.rspack.dev/rslib/rslib-logo-192x192.png',
   logoText: 'Rslib',