Fix broken connections in pool

src/invidious/helpers/utils.cr

@@ -1595,7 +1595,9 @@ struct HTTPPool
   end
 
   def client(region = nil, &block)
-    pool.connection do |conn|
+    conn = pool.checkout
+
+    begin
       if region
         PROXY_LIST[region]?.try &.sample(40).each do |proxy|
           begin
@@ -1607,7 +1609,6 @@ struct HTTPPool
         end
       end
 
-      begin
       response = yield conn
       conn.unset_proxy
       response
@@ -1617,7 +1618,8 @@ struct HTTPPool
       conn.read_timeout = 5.seconds
       conn.connect_timeout = 5.seconds
       yield conn
-      end
+    ensure
+      pool.checkin(conn)
     end
   end