[Docs] fix typo in Using Layers (#8448)

* [Docs] fix typos

Fix #8172

* Update docs/developer-guide/using-layers.md

Co-authored-by: felixpalmer <felixpalmer@gmail.com>

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Co-authored-by: felixpalmer <felixpalmer@gmail.com>
Co-authored-by: Chris Gervang <chrisgervang@users.noreply.github.com>

Author: 3 people

docs/developer-guide/using-layers.md

@@ -106,7 +106,7 @@ deck.gl's architecture is based on the reactive programming paradigm:
 
 * In a reactive application, a complete UI description is "re-rendered" every time something in the application state changes (in the case of a deck.gl application, a new list of layers is created whenever something changes).
 * The UI framework (in this case, deck.gl) makes the choices about what to update, by comparing (or "diffing") the newly rendered UI description with the last rendered UI description.
-* The framework then the makes minimal necessary changes to account for the differences, and then redraws.
+* The framework then makes the minimal necessary changes to account for the differences, and then redraws.
 * The required changes are made to "WebGL state" in case of deck.gl, and to the Browser's DOM (HTML element tree) in case of React.
 
 #### Creating Layer Instances Is Cheap