Update src/invidious/routes/channels.cr

Co-authored-by: Samantaz Fox <coding@samantaz.fr>

src/invidious/routes/channels.cr

@@ -57,7 +57,7 @@ module Invidious::Routes::Channels
     end
 
     items, continuation = fetch_channel_playlists(channel.ucid, channel.author, continuation, sort_by)
-    items = items.select(SearchPlaylist).map { |item| item.as(SearchPlaylist) }
+    items = items.select(SearchPlaylist).map(&.as(SearchPlaylist))
     items.each(&.author=(""))
 
     templated "playlists"