Broken links in tutorial: from and to section

[jfhector]

In the section from and to in the tutorial, the links to the Karabiner docs are broken.

So in the karabiner.json spec, there're from event definition and to event definition.

Instead of the above, the links should be:

• from event definition: https://karabiner-elements.pqrs.org/docs/json/complex-modifications-manipulator-definition/from/
• to event definition: https://karabiner-elements.pqrs.org/docs/json/complex-modifications-manipulator-definition/to/