https://polkadot.subsquare.io/referenda/1436

• This change increases the scheduler lookahead value to 3.
• The scheduler lookahead shows which parachains will be used soon.
• Currently, it is set to 2, showing only two blocks ahead.
• There is a difference because other parameters use three blocks.
• The async backing can accept candidates based on three blocks.
• Making the scheduler lookahead 3 will fix this difference.
• Similar changes have already been made in Kusama.