unresponsive highlight in "Custom" on page "Custom Integration Overview"

## **Steps**
1. navigate to: "https://ecsact.dev/start/custom#elements"
2. in the top right of "On this page" click through "Ecsact Runtime API" - "API Access Runtime Abstractions" - "Automatic System Execution"

## **Result**
 - Ecsact Runtime API
 -  API Access Runtime Abstractions
 -  Automatic System

  all options above do not respond with highlighted underline text
