doc: Improve indexRange documentation

docs/api.md

@@ -54,7 +54,7 @@ The `SpatialNavigationNode` component receives the following props:
 
 | `alignInGrid` | `boolean`                   | `false`      | Determines whether child lists should behave like a grid.
 
-| `indexRange`  | `number[]`                  | `undefined`  | Determines the indexes when using long nodes in a grid. cf : https://github.com/bbc/lrud/blob/master/docs/usage.md#indexrange 
+| `indexRange`  | `number[]`                  | `undefined`  | Determines the indexes when using long nodes in a grid. If a grid row has one `indexRange`, you should specify each element's `indexRange`. You can check for more details in [`GridWithLongNodesPage`](https://github.com/bamlab/react-tv-space-navigation/blob/31bfe1def4a7e18e9e41f26a520090d1b7a5b149/packages/example/src/pages/GridWithLongNodesPage.tsx) example or in [lrud documentation](https://github.com/bbc/lrud/blob/master/docs/usage.md#indexrange). 
 
 | `children`    | `function` or `ReactNode`   | `null`       | Child elements of the component. It can be a function that returns a React element and accepts a parameter with a `isFocused` property when `isFocusable` is `true`. If `isFocusable` is `false` or not provided, it can be any valid React node.             |