(docs) fix slot syntax

Author: antoine92190

README.md

@@ -621,7 +621,7 @@ messageActionHandler({ roomId, action, message }) {
 Example:
 
 ```javascript
-<template v-slot:room-header="{ room, userStatus }">
+<template #room-header="{ room, userStatus }">
   {{ room.roomName }} - {{ userStatus }}
 </template>
 ```

demo/src/ChatContainer.vue

@@ -65,7 +65,7 @@
 			@typing-message="typingMessage"
 			@toggle-rooms-list="$emit('show-demo-options', $event.opened)"
 		>
-			<!-- <template v-slot:room-header="{ room }">
+			<!-- <template #room-header="{ room }">
 				{{ room.roomName }}
 			</template> -->
 		</chat-window>