Squiz.CSS.SemicolonSpacing.NotAtEnd false positive on classes with numbers

[abarker-gravity]

Describe the bug

ERROR | Style definitions must end with a semicolon (Squiz.CSS.SemicolonSpacing.NotAtEnd)

This is caused by any class containing a number

--bs-gray-100 or --bs-border-radius-2xl

Code sample

:root,
[data-bs-theme=dark] {
    --bs-gray-100: #F8F9FA;
    --bs-gray-200: #E9ECEF;
    --bs-gray-300: #DEE2E6;
    --bs-gray-400: #CED4DA;
    --bs-gray-500: #ADB5BD;
    --bs-gray-600: #6C757D;
    --bs-gray-700: #495057;
    --bs-gray-800: #343A40;
    --bs-gray-900: #212529;
    --bs-border-radius-xxl: 2rem;
    --bs-border-radius-2xl: var(--bs-border-radius-xxl);
}

Custom ruleset

<?xml version="1.0"?>
<ruleset name="Testing Bug">
    <rule ref="Squiz">
</ruleset>

To reproduce

Steps to reproduce the behavior:

1. Create a css file called test.css with the code sample above...
2. Run phpcs test.css ...
3. See error message displayed

  3 | ERROR | Style definitions must end with a semicolon (Squiz.CSS.SemicolonSpacing.NotAtEnd)
  4 | ERROR | Style definitions must end with a semicolon (Squiz.CSS.SemicolonSpacing.NotAtEnd)
  5 | ERROR | Style definitions must end with a semicolon (Squiz.CSS.SemicolonSpacing.NotAtEnd)
  6 | ERROR | Style definitions must end with a semicolon (Squiz.CSS.SemicolonSpacing.NotAtEnd)
  7 | ERROR | Style definitions must end with a semicolon (Squiz.CSS.SemicolonSpacing.NotAtEnd)
  8 | ERROR | Style definitions must end with a semicolon (Squiz.CSS.SemicolonSpacing.NotAtEnd)
  9 | ERROR | Style definitions must end with a semicolon (Squiz.CSS.SemicolonSpacing.NotAtEnd)
  10 | ERROR | Style definitions must end with a semicolon (Squiz.CSS.SemicolonSpacing.NotAtEnd)
  11 | ERROR | Style definitions must end with a semicolon (Squiz.CSS.SemicolonSpacing.NotAtEnd)
 13 | ERROR | Style definitions must end with a semicolon (Squiz.CSS.SemicolonSpacing.NotAtEnd)

Expected behavior

A clear and concise description of what you expected to happen.

Versions (please complete the following information)

	.
Operating System	Docker php:8.3-fpm (official)
PHP version	8.3
PHP_CodeSniffer version	3.10.1
Standard	Squiz
Install type	composer (local)

Additional context

Add any other context about the problem here.

Please confirm

• [X] I have searched the issue list and am not opening a duplicate issue.
• [X] I have read the Contribution Guidelines and this is not a support question.
• [X] I confirm that this bug is a bug in PHP_CodeSniffer and not in one of the external standards.
• [X] I have verified the issue still exists in the master branch of PHP_CodeSniffer.