Fix the issues reported by phpcs

Problem/Motivation
phpcs --standard=Drupal,DrupalPractice --extensions=php,module,inc,install,test,profile,theme,css,info,txt,md,yml,twig modules/contrib/font_resize/

FILE: /var/www/html/VB/drupal-10.1.0/modules/contrib/font_resize/src/Plugin/Block/ResizeBlock.php
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FOUND 4 ERRORS AND 3 WARNINGS AFFECTING 6 LINES
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22 | WARNING | [ ] Unused variable $label_plus.
23 | WARNING | [ ] Unused variable $label_minus.
24 | WARNING | [ ] Unused variable $label_original.
32 | ERROR | [x] Short array syntax must be used to define arrays
34 | ERROR | [x] Short array syntax must be used to define arrays
35 | ERROR | [x] Short array syntax must be used to define arrays
35 | ERROR | [ ] The array declaration extends to column 88 (the limit is 80). The array content should be split up over multiple lines
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PHPCBF CAN FIX THE 3 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: /var/www/html/VB/drupal-10.1.0/modules/contrib/font_resize/README.md
--------------------------------------------------------------------------
FOUND 1 ERROR AND 1 WARNING AFFECTING 2 LINES
--------------------------------------------------------------------------
3 | WARNING | [ ] Line exceeds 80 characters; contains 82 characters
21 | ERROR | [x] Expected 1 newline at end of file; 0 found

Steps to reproduce

phpcs --standard=Drupal,DrupalPractice --extensions=php,module,inc,install,test,profile,theme,css,info,txt,md,yml,twig modules/contrib/font_resize/

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes