Fix index tag

[jacksleight]

$from should be the value not a boolean.

[what-the-diff]

PR Summary

• Updated Method Call in StatamicCuratedCollection Class
  The code was modified in a way that improves data retrieval in our system. Instead of checking simply if the data named 'from' exists, we are now grabbing this 'from' data directly. This allows the system to operate more effectively by making the process of getting data more consistent and reliable.