Update all sub titles automatically

[Tvax]

Describe your feature request

When modifying a H3 title to an H4 title all the sub titles should also be automatically updated to keep the same table of content structure.

What problem does this feature solve?

Having to keep track of all the titles to update manually, also to avoid mistakes and missing any titles during the process.

Additional context

For this file structure:

Updating the first title Heading type from H3 to H2:

Should automatically updates all the sub titles as well: