Coding Standards: Update PHPCS to version 3.10.3.

PHPCS has seen several new releases since the last update, which means more bugs have been fixed, syntax support for PHP 8.3 was added, more sniff documentation is available, performance improvements, a new Help screen, etc.

References:
* [https://github.com/PHPCSStandards/PHP_CodeSniffer/releases/tag/3.10.3 PHP_CodeSniffer 3.10.3 release notes]
* [https://github.com/PHPCSStandards/PHP_CodeSniffer/releases/tag/3.10.2 PHP_CodeSniffer 3.10.2 release notes]
* [https://github.com/PHPCSStandards/PHP_CodeSniffer/releases/tag/3.10.1 PHP_CodeSniffer 3.10.1 release notes]
* [https://github.com/PHPCSStandards/PHP_CodeSniffer/releases/tag/3.10.0 PHP_CodeSniffer 3.10.0 release notes]
* [https://github.com/PHPCSStandards/PHP_CodeSniffer/releases/tag/3.9.2 PHP_CodeSniffer 3.9.2 release notes]
* [https://github.com/PHPCSStandards/PHP_CodeSniffer/releases/tag/3.9.1 PHP_CodeSniffer 3.9.1 release notes]

Follow-up to [56695], [56799], [57378], [57986].

Props jrf.
Fixes #62076.

git-svn-id: https://develop.svn.wordpress.org/trunk@59067 602fd350-edb4-49c9-b593-d223f7449a82

Author: SergeyBiryukov

composer.json

@@ -17,7 +17,7 @@
 		"ext-dom": "*"
 	},
 	"require-dev": {
-		"squizlabs/php_codesniffer": "3.9.0",
+		"squizlabs/php_codesniffer": "3.10.3",
 		"wp-coding-standards/wpcs": "~3.1.0",
 		"phpcompatibility/phpcompatibility-wp": "~2.1.3",
 		"yoast/phpunit-polyfills": "^1.1.0"