fix: get the presence of the requested user instead of ourselves

after getting the shared rooms with the target user, we actually only
get the presence of ourselves instead of the requested user

Signed-off-by: strawberry <strawberry@puppygock.gay>

src/api/client_server/presence.rs

@@ -42,7 +42,7 @@ pub(crate) async fn get_presence_route(body: Ruma<get_presence::v3::Request>) ->
 		.user
 		.get_shared_rooms(vec![sender_user.clone(), body.user_id.clone()])?
 	{
-		if let Some(presence) = services().presence.get_presence(sender_user)? {
+		if let Some(presence) = services().presence.get_presence(&body.user_id)? {
 			presence_event = Some(presence);
 			break;
 		}