Fix typo

docs/getting-started/customizing.md

@@ -28,7 +28,7 @@ Design tokens are described further along in this documentation. For a complete
 
 Whereas design tokens offer a high-level way to customize the library, component parts offer a low-level way to customize individual components. Again, this is done with pure CSS — no preprocessor required.
 
-Shoelace components use a [shadow DOM](https://developer.mozilla.org/en-US/docs/Web/Web_Components/Using_shadow_DOM) to encapsulate their styles and behaviors. As a result, you can't simply target their internals with the usual CSS selectors. Instead, components expose "parts" that can be targetted with the [CSS part selector](https://developer.mozilla.org/en-US/docs/Web/CSS/::part), or `::part()`.
+Shoelace components use a [shadow DOM](https://developer.mozilla.org/en-US/docs/Web/Web_Components/Using_shadow_DOM) to encapsulate their styles and behaviors. As a result, you can't simply target their internals with the usual CSS selectors. Instead, components expose "parts" that can be targeted with the [CSS part selector](https://developer.mozilla.org/en-US/docs/Web/CSS/::part), or `::part()`.
 
 Here's an example that modifies buttons with the `tomato-button` class.