chore: update

Author: Timeless0911

website/docs/en/guide/start/glossary.mdx

@@ -21,6 +21,10 @@ CJS stands for [CommonJS](https://nodejs.org/api/modules.html#modules-commonjs-m
 
 Bundleless refers to a development approach that avoids the traditional practice of bundling multiple JavaScript / TypeScript files into a single or fewer output files before serving them to the client. Instead, it aims to serve individual modules directly.
 
+## DTS
+
+DTS stands for [TypeScript Declaration Files](https://www.typescriptlang.org/docs/handbook/declaration-files/introduction.html), providing type information for JavaScript code.
+
 ## Module Federation
 
 <MF />