docs: improve sentence (#1634)

Co-authored-by: Eduardo San Martin Morote <[email protected]>

Author: gass-git

packages/docs/guide/advanced/meta.md

@@ -5,7 +5,7 @@
   title="Learn how to use route meta fields"
 />
 
-Sometimes, you might want to attach arbitrary information to routes like transition names, who can access the route, etc. This can be achieved through the `meta` property which accepts an object of properties and can be accessed on the route location and navigation guards. You can define `meta` properties like this:
+Sometimes, you might want to attach arbitrary information to routes like： transition names, or roles to control who can access the route, etc. This can be achieved through the `meta` property which accepts an object of properties and can be accessed on the route location and navigation guards. You can define `meta` properties like this:
 
 ```js
 const routes = [