Expose the abstract of the blogpost correctly when selecting the automatic fill option

• Type: Story
• Status: In Review
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: None
• Fix Version/s: None
• Component/s: Headless Delivery API
• Labels:
  • fc_21_02
  • fc_21_03
• Git Pull Request: https://github.com/liferay-headless/liferay-portal/pull/624

As a content creator

I want that the API exposes the abstract with the first 400 characters when the option is selected

so that the applications consume the correct information