[BUG] Text web parts added to the page are not using the latest version (CKEditor 4 instead of 5)

[nloand]

Problem Area

[x] Page Transformation: Page is not looking correct after transformation

Expected or Desired Behavior

When creating a page, the latest version of the text web part will be used and displayed on view and edit.

Observed Behavior

When creating a page, when text web parts are added to the page, it is using "contentVersion: 4" instead of "contentVersion: 5". When editing the page after transformation, the web part displays correctly. After saving, it displays incorrectly if any styles form CKEditor 5 were used (ex: Pull Quote: Boxed)

Steps to Reproduce

1. Transform a publishing page with text on it.
2. Edit the page and use a new RTE style added in version 5, such as Pull Quote : Boxed.
3. Save the page.
4. The new style will not be displayed correctly, instead using CKEditor version 4 styles as a fallback.