message: fix documentation for useHotkeys API
diff: @@ -58,15 +58,15 @@ useHotkeys('w, a, s, d', () => alert('Player moved!'))
  :::tip Differentiating between multiple possible keys
  -If we use a combination of possible keys that use the same hook, we can use `handler.key` to check which key the user
  +If we use a combination of possible keys that use the same hook, we can use `handler.keys` to check which key the user
  pressed.
  ```jsx
  useHotkeys('ctrl+a, shift+b, r, f', (_, handler) => {
  - switch (handler.key) {
  - case 'ctrl+a': alert('You pressed ctrl+a!');
  + switch (handler.keys.join('')) {
  + case 'a': alert('You pressed ctrl+a!');
  break;
  - case 'ctrl+b': alert('You pressed ctrl+b!');
  + case 'b': alert('You pressed ctrl+b!');
  break;
  case 'r': alert('You pressed r!');
  break;
  @@ -82,10 +82,10 @@ This can also be an array:
  ```jsx
  useHotkeys(['ctrl+a', 'shift+b', 'r', 'f'], (_, handler) => {
  - switch (handler.key) {
  - case 'ctrl+a': alert('You pressed ctrl+a!');
  + switch (handler.keys.join('')) {
  + case 'a': alert('You pressed ctrl+a!');
  break;
  - case 'ctrl+b': alert('You pressed ctrl+b!');
  + case 'b': alert('You pressed ctrl+b!');
  break;
  case 'r': alert('You pressed r!');
  break;
  @@ -115,9 +115,9 @@ check out the [MDN Web Docs](https://developer.mozilla.org/en-US/docs/Web/API/Ke
  The `handler` holds information about the pressed key. In general, we should only need this object to handle our keyboard
  events.
  -The most important property of the `handler` object is the `key` prop:
  +The most important property of the `handler` object is the `keys` prop:
  -* `key: string` - This will hold the pressed keystroke. So if we use multiple possible keystroke combinations for the same callback
  +* `keys: string[]` - This will hold the pressed keystroke. So if we use multiple possible keystroke combinations for the same callback
  we can use this property to check which specific keystroke was pressed.
  > There are more properties attached to the handle that currently don't get populated with values. So we can safely ignore those.
  