docs(readme): update quickstart example

README.md

@@ -2,7 +2,7 @@
 
 A **jsx-free**, **super-lightweight** and **zero-dependency** library to add reactivity to the web — without all the nonsense.
 
-> [!IMPORTANT]  
+> [!IMPORTANT]
 > Tent is currently in early development. It _can_ be used in production, but there might be breaking changes in future versions. If you're interested in contributing, please submit a PR or report an issue. Keep track of the changes in the [CHANGELOG](CHANGELOG.md).
 
 ## ⚙️ Installation
@@ -36,8 +36,8 @@ const Counter: Component<State> = {
   },
 };
 
-// Append the component to the body
-mount(document.body, Counter);
+// Append the component to an element in the DOM
+mount(document.querySelector('.counter'), Counter);
 ```
 
 ## 💡 Examples