add note about destructuring breaking reactivity (#986)

src/routes/concepts/components/props.mdx

@@ -56,7 +56,8 @@ Instead, you should access props directly from the `props` object, or wrap them
 
 ```typescript
 function MyComponent(props) {
-	const name = props.name; // ❌: breaks reactivity and will not update when the prop value changes
+	const { name } = props; // ❌: breaks reactivity and will not update when the prop value changes
+	const name = props.name; // ❌: another example of breaking reactivity
 	const name = () => props.name; // ✓: by wrapping `props.name` into a function, `name()` always retrieves its current value
 }
 ```