Fixed #3287 - Fixed to work TOC links

[roottool]

Description

I changed scrollTo() from window to document.body.

Screenshot

Issue fixed

#3287

Type of changes

• 🔘 Bug fix (Change that fixed an issue)
• ⚪ Breaking change (Change that can cause existing functionality to change)
• ⚪ Improvement (Change that improves the code. Maybe performance or development improvement)
• ⚪ Feature (Change that adds new functionality)
• ⚪ Documentation change (Change that modifies documentation. Maybe typo fixes)

Checklist:

• 🔘 My code follows the project code style
• ⚪ I have written test for my code and it has been tested
• 🔘 All existing tests have been passed
• 🔘 I have attached a screenshot/video to visualize my change if possible

[ZeroX-DG]

Thank you for your contribution but this PR is more complete so we'll use it instead. But thank you for this PR.
#3294