Update part-6-performance-normalization.md

Author: warlock1996

docs/tutorials/essentials/part-6-performance-normalization.md

@@ -1033,7 +1033,7 @@ The concepts we've covered in this tutorial so far should be enough to get you s
 
 **Redux Toolkit also includes a powerful data fetching and caching API called "RTK Query"**. RTK Query is an optional addon that can completely eliminate the need to write any data fetching logic yourself. In [Part 7: RTK Query Basics](./part-7-rtk-query-basics.md), you'll learn what RTK Query is, what problems it solves, and how to use it to fetch and use cached data in your application.
 
-The Redux Essentials tutorial focused on "how to use Redux correctly", rather than "how it works" or "why it works this way". In particular, Redux Toolkit is a higher-level set of abstractions and utilities, and it's helpful to understand what the abstractions in RTK are actually doing for you. Reading through the ["Redux Fundamentals" tutorial](../fundamentals/part-1-overview.md) will help you understand how to write Redux code "by hand", and why we recommend Redux Toolkit as the default way to write Redux logic.
+The Redux Essentials tutorial is focused on "how to use Redux correctly", rather than "how it works" or "why it works this way". In particular, Redux Toolkit is a higher-level set of abstractions and utilities, and it's helpful to understand what the abstractions in RTK are actually doing for you. Reading through the ["Redux Fundamentals" tutorial](../fundamentals/part-1-overview.md) will help you understand how to write Redux code "by hand", and why we recommend Redux Toolkit as the default way to write Redux logic.
 
 The [Using Redux](../../usage/index.md) section has information on a number of important concepts, like [how to structure your reducers](../../usage/structuring-reducers/StructuringReducers.md), and [our Style Guide page](../../style-guide/style-guide.md) has important information on our recommended patterns and best practices.