docs: update cli section (#358)

docs/guide/index.md

@@ -47,7 +47,7 @@ See the list of config options in the [Config Reference](../config/)
 
 ## Command Line Interface
 
-In a project where Vitest is installed, you can use the `vitest` binary in your npm scripts, or run it directly with `npx vitest`. Here is the default npm scripts in a scaffolded Vite project:
+In a project where Vitest is installed, you can use the `vitest` binary in your npm scripts, or run it directly with `npx vitest`. Here are the default npm scripts in a scaffolded Vitest project:
 
 <!-- prettier-ignore -->
 ```json5
@@ -59,7 +59,8 @@ In a project where Vitest is installed, you can use the `vitest` binary in your
 }
 ```
 
-You can specify additional CLI options like `--port` or `--https`. For a full list of CLI options, run `npx vite --help` in your project.
+To run tests once without watching for file changes, use `vitest run`.
+You can specify additional CLI options like `--port` or `--https`. For a full list of CLI options, run `npx vitest --help` in your project.
 
 ### CLI Commands