MC-17823: Access Images/Widgets/Variable from HTML content type

- add hard dependency

Author: anthoula

app/code/Magento/PageBuilder/composer.json

@@ -11,6 +11,7 @@
         "magento/module-catalog": "*",
         "magento/module-config": "*",
         "magento/module-ui": "*",
+        "magento/module-variable": "*",
         "magento/module-widget": "*",
         "magento/module-catalog-widget": "*",
         "magento/module-rule": "*",