message: Correct `merkle_tree_hash_activation` param in chainspec
diff: @@ -15,7 +15,7 @@ activation_point = '${TIMESTAMP}'
  # Optional era ID in which the last emergency restart happened.
  #last_emergency_restart = 0
  # The era ID starting at which the new Merkle tree-based hashing scheme is applied.
  -merkle_tree_hash_activation = 2,
  +merkle_tree_hash_activation = 2
  [network]
  # Human readable name for convenience; the genesis_hash is the true identifier. The name influences the genesis hash by
  