fix: render issue of nested list

[LucasXu0]

Make sure the numbers are the same as in the markdown.

[codecov]

Codecov Report

Attention: Patch coverage is 73.33333% with 4 lines in your changes missing coverage. Please review.

Project coverage is 73.38%. Comparing base (f6ee2fc) to head (2c7e795).

Files	Patch %	Lines
...ponent/table_block_component/table_col_border.dart	57.14%	3 Missing ⚠️
...ck_component/table_block_component/table_node.dart	50.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #838   +/-   ##
=======================================
  Coverage   73.38%   73.38%           
=======================================
  Files         315      315           
  Lines       14576    14584    +8     
=======================================
+ Hits        10696    10702    +6     
- Misses       3880     3882    +2     

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