docs: fix http-server example from in-page feedback (#2580)

Author: lornajane

Diff for: docs/deployment/intro.md

@@ -104,7 +104,7 @@ npm install -g http-server
 Then, `cd` into your project directory and run the following command:
 
 ```node
-http - server;
+http-server
 ```
 
 The output after entering the command provides the local URL where the preview can be accessed.