bug: text ending with numbers in underscore block is not italic

[litoj]

Did you check existing issues?

• I have read all the tree-sitter docs if it relates to using the parser
• I have searched the existing issues

Tree-Sitter CLI Version, if relevant (output of tree-sitter --version)

No response

Describe the bug

text like _hello1_ doesn't get recognized parsed as italic block, but *hello1* does.

Steps To Reproduce/Bad Parse Tree

I used neovim in markdown file with _hi1_ written in it.

Expected Behavior/Parse Tree

I would expect the contents to be matched as an italic block.

Repro

I'm sorry, I have no experience with the tree-sitter cli, let alone the library.