[📄 DOCS] Formatting issue with nested lists in tgb docstring

[arcanaxion]

🔍 Issue Description

There should be 3 levels of nesting in the on_action docstring here, but it appears as just 1 on VS Code:

This is tgb.input, but I suppose most nested lists will have this problem.

📜 Code of Conduct

• I have checked the existing issues to avoid duplicates.
• I am willing to work on this issue (optional)

✅ Acceptance Criteria

• The documentation has been generated without errors.
• The new text has been reviewed for grammar and clarity.
• The 90-character line length limit has been followed where possible.
• All links and cross-references in the documentation work correctly.
• If applicable, screenshots of the updated documentation are included in the pull request.