Close http clients after using

The crystal http client maintains a keepalive connection to the other
server which stays alive for some time. This should be closed if the
client instance is not used again to avoid hogging resources

src/invidious/comments.cr

@@ -269,6 +269,8 @@ def fetch_reddit_comments(id, sort_by = "confidence")
     raise InfoException.new("Could not fetch comments")
   end
 
+  client.close
+
   comments = result[1].data.as(RedditListing).children
   return comments, thread
 end