Fix phpcs issues

Problem/Motivation

Fix phpcs issues as per report in https://www.drupal.org/project/paragraphs_previewer/issues/3527021 📌 Add Gitlab CI: phpcs, etc Active

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A TOTAL OF 12 SNIFF VIOLATIONS WERE FOUND IN 8 SOURCES
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PHPCBF CAN FIX THE 8 MARKED SOURCES AUTOMATICALLY (12 VIOLATIONS IN TOTAL)
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Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes