docs(README.md): fix typo excalidrawRef -> ref (#3170)

src/packages/excalidraw/README.md

@@ -237,7 +237,7 @@ export default function IndexPage() {
 | [`offsetTop`](#offsetTop) | Number | `0` | top position relative to which Excalidraw should render |
 | [`onChange`](#onChange) | Function |  | This callback is triggered whenever the component updates due to any change. This callback will receive the excalidraw elements and the current app state. |
 | [`initialData`](#initialData) | <pre>{elements?: <a href="https://github.com/excalidraw/excalidraw/blob/master/src/element/types.ts#L78">ExcalidrawElement[]</a>, appState?: <a href="https://github.com/excalidraw/excalidraw/blob/master/src/types.ts#L37">AppState<a> } </pre> | null | The initial data with which app loads. |
-| [`excalidrawRef`](#excalidrawRef) | [`createRef`](https://reactjs.org/docs/refs-and-the-dom.html#creating-refs) or [`callbackRef`](https://reactjs.org/docs/refs-and-the-dom.html#callback-refs) or <pre>{ current: { readyPromise: <a href="https://github.com/excalidraw/excalidraw/blob/master/src/utils.ts#L317">resolvablePromise</a> } }</pre> |  | Ref to be passed to Excalidraw |
+| [`ref`](#ref) | [`createRef`](https://reactjs.org/docs/refs-and-the-dom.html#creating-refs) or [`callbackRef`](https://reactjs.org/docs/refs-and-the-dom.html#callback-refs) or <pre>{ current: { readyPromise: <a href="https://github.com/excalidraw/excalidraw/blob/master/src/utils.ts#L317">resolvablePromise</a> } }</pre> |  | Ref to be passed to Excalidraw |
 | [`onCollabButtonClick`](#onCollabButtonClick) | Function |  | Callback to be triggered when the collab button is clicked |
 | [`isCollaborating`](#isCollaborating) | `boolean` |  | This implies if the app is in collaboration mode |
 | [`onPointerUpdate`](#onPointerUpdate) | Function |  | Callback triggered when mouse pointer is updated. |
@@ -319,7 +319,7 @@ This helps to load Excalidraw with `initialData`. It must be an object or a [pro
 
 You might want to use this when you want to load excalidraw with some initial elements and app state.
 
-#### `excalidrawRef`
+#### `ref`
 
 You can pass a `ref` when you want to access some excalidraw APIs. We expose the below APIs: