fix typos

Author: yjose

docs/src/content/docs/guides/authentication.mdx

@@ -8,13 +8,13 @@ head:
 
 import CodeBlock from '../../../components/code.astro';
 
-Most of the applications we had the chance to work on required some sort of authentication, and having a bad approach to do it can lead to a lot of problems. The starter kit comes with the basics and mostly what you need to start with authentication in your application.
+Most of the applications we had the chance to work on required some sort of authentication and having a bad approach to do it can lead to a lot of problems. The starter kit comes with the basics and mostly what you need to start with authentication in your application.
 
 As Authentication is global to the application, we end up using Zustand to manage the authentication state of the application.
 
 [Zustand](https://github.com/pmndrs/zustand) is a state management library that is very simple to use and highly performant. It is also easy to integrate with React and works better than a simple context API, as it offers additional features such as selectors to prevent unnecessary re-renders.
 
-Zustand works very well with TypeScript and can be easily used outside React Three, which means more flexibility.
+Zustand works very well with TypeScript and can be easily used outside the React tree, which means more flexibility.
 
 ## Authentication Store