Fix issues reported by PHPCS

MR Raised

Hi

I reviewed MR!198 and confirmed it fixes the PHPCS issue reported by the Gitlab CI. However I found some issues while applying MR!198 on my end, please see below:

➜  layout_paragraphs git:(main) ✗ curl https://git.drupalcode.org/project/layout_paragraphs/-/merge_requests/198.diff | patch -p1
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  5814    0  5814    0     0  17900      0 --:--:-- --:--:-- --:--:-- 18225
patching file 'css/builder.css'
Reversed (or previously applied) patch detected!  Assume -R? [y] y
2 out of 3 hunks failed--saving rejects to 'css/builder.css.rej'
patching file 'templates/layout-paragraphs-builder-formatter.html.twig'
patching file 'templates/layout-paragraphs-builder-section-menu.html.twig'
patching file 'templates/layout-paragraphs-builder.html.twig'
patching file 'tests/modules/layout_paragraphs_translations_test/templates/paragraph--section.html.twig'
patching file 'tests/modules/layout_paragraphs_translations_test/templates/paragraph--text.html.twig'
patching file 'tests/src/FunctionalJavascript/BlockFieldTest.php'
patching file 'tests/src/FunctionalJavascript/FormRenderingTest.php'
patching file 'tests/src/FunctionalJavascript/NestedSectionsTest.php'
➜  layout_paragraphs git:(main) ✗

Will retain the status to "Needs Review" so that others can also check.
Thank you.