📝 Link to essentials tutorial from RTKQ quick start

Author: Shrugsy

docs/tutorials/rtk-query.mdx

@@ -23,7 +23,7 @@ hide_title: true
 
 ## Introduction
 
-Welcome to the Redux Toolkit Query tutorial! **This tutorial will briefly introduce you to Redux Toolkit's "RTK Query" data fetching capability and teach you how to start using it correctly**.
+Welcome to the Redux Toolkit Query tutorial! **This tutorial will briefly introduce you to Redux Toolkit's "RTK Query" data fetching capability and teach you how to start using it correctly**. For a more in-depth tutorial, refer to the [essentials tutorial](https://redux.js.org/tutorials/essentials/part-7-rtk-query-basics) on the Redux core docs site.
 
 RTK Query is an advanced data fetching and caching tool, designed to simplify common cases for loading data in a web application. RTK Query itself is built on top of the Redux Toolkit core, and leverages RTK's APIs like [`createSlice`](../api/createSlice.mdx) and [`createAsyncThunk`](../api/createAsyncThunk.mdx) to implement its capabilities.