docs: update serve command default port

docs/guide/deploy.md

@@ -34,7 +34,7 @@ $ yarn docs:build
 $ yarn docs:serve
 ```
 
-The `serve` command will boot up local static web server that serves the files from `.vitepress/dist` at http://localhost:3000. It's an easy way to check if the production build looks OK in your local environment.
+The `serve` command will boot up local static web server that serves the files from `.vitepress/dist` at http://localhost:5000. It's an easy way to check if the production build looks OK in your local environment.
 
 You may configure the port of the server py passing `--port` flag as an argument.