message: chore: fix fork test comment
diff: @@ -120,7 +120,7 @@ fn test_find_fork_case2() {
  parent = new_block.header().to_owned();
  }
  - // fork2 total_difficulty 400
  + // fork1 total_difficulty 400
  for blk in &fork1 {
  chain_service
  .process_block(Arc::new(blk.clone()), false)
  @@ -136,6 +136,7 @@ fn test_find_fork_case2() {
  let tip_number = { shared.lock_chain_state().tip_number() };
  + // fork2 total_difficulty 480
  let difficulty = parent.difficulty().to_owned();
  let new_block = gen_block(
  &parent,
  @@ -204,7 +205,7 @@ fn test_find_fork_case3() {
  parent = new_block.header().to_owned();
  }
  - // fork2 total_difficulty 240
  + // fork1 total_difficulty 240
  for blk in &fork1 {
  chain_service
  .process_block(Arc::new(blk.clone()), false)
  @@ -220,6 +221,7 @@ fn test_find_fork_case3() {
  let tip_number = { shared.lock_chain_state().tip_number() };
  + // fork2 total_difficulty 300
  let new_block = gen_block(&parent, U256::from(100u64), vec![], vec![], vec![]);
  fork2.push(new_block.clone());
  @@ -280,7 +282,7 @@ fn test_find_fork_case4() {
  parent = new_block.header().to_owned();
  }
  - // fork2 total_difficulty 200
  + // fork1 total_difficulty 200
  for blk in &fork1 {
  chain_service
  .process_block(Arc::new(blk.clone()), false)
  @@ -296,6 +298,7 @@ fn test_find_fork_case4() {
  let tip_number = { shared.lock_chain_state().tip_number() };
  + // fork2 total_difficulty 260
  let new_block = gen_block(&parent, U256::from(100u64), vec![], vec![], vec![]);
  fork2.push(new_block.clone());
  