UHF-9348: Add fix for image-placeholder size on content cards paragraph

[teroelonen]

UHF-9348

What was done

• Changed the image placeholder aspect ratio on content cards paragraph.

How to install

• Make sure your instance is up and running on latest dev branch.
  • git pull origin dev
  • make fresh
• Update the HDBT theme
  • composer require drupal/hdbt:dev-UHF-9348
• Run make drush-cr

How to test

• Go to add a new page and add content cards paragraph for it on any instance you like.
• Add two content references for the paragraph and make sure the other one doesn't have the liftup image and other one has.
• The placeholder image and the real image should be now in the same aspect ratio and so the same height. Previously the image placeholder was smaller.
• Check that code follows our standards

Continuous documentation

• This feature has been documented/the documentation has been updated
• This change doesn't require updates to the documentation

[github-actions]

⚠️ Visual regression found! Please check if this change is wanted or accidental. You can check the output here: https://city-of-helsinki.github.io/drupal-hdbt/pull/966/html_report/

[github-actions]

✅ Tests passed! You can check the output here: https://city-of-helsinki.github.io/drupal-hdbt/pull/966/html_report/