make local_aliases_for_room db iterator Send

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

src/service/rooms/alias/data.rs

@@ -84,7 +84,7 @@ impl Data {
 
 	pub(super) fn local_aliases_for_room<'a>(
 		&'a self, room_id: &RoomId,
-	) -> Box<dyn Iterator<Item = Result<OwnedRoomAliasId>> + 'a> {
+	) -> Box<dyn Iterator<Item = Result<OwnedRoomAliasId>> + 'a + Send> {
 		let mut prefix = room_id.as_bytes().to_vec();
 		prefix.push(0xFF);