PHP Deprecated: Using ${var} in strings is deprecated, use {$var} instead.

Problem/Motivation

Since PHP 8.2, PHP emits a deprecation notice on the following pattern that the dollar sign ($) is placed at the outside of the curly braces. It can be seen in several places:
PHP Deprecated: Using ${var} in strings is deprecated, use {$var} instead in /var/www/html/docroot/modules/contrib/paragraphs_sets_plugins/src/PluginManager.php on line 37

Steps to reproduce

1. Use a Drupal 10 project with PHP 8.2
1. Add drupal/gutenberg module via composer.
3. Observe warnings in the terminal when using drush or via the web interface.

Proposed resolution

Use {$var} syntax instead of ${var} syntax to avoid deprecation notice.