Fix php8.1 support

Author: thomas-kl1

Model/Config/PathType.php

@@ -1,6 +1,7 @@
 <?php
 /**
  * Copyright © OpenGento, All rights reserved.
+ * See LICENSE bundled with this library for license details.
  */
 declare(strict_types=1);
 
@@ -10,21 +11,28 @@
 
 enum PathType: string
 {
+    private const STORE_CODE = 'store_code';
+    private const COUNTRY_CODE = 'country_code';
+    private const LANGUAGE_CODE = 'language_code';
+    private const LOCALE_UNDERSCORE = 'locale_underscore';
+    private const LOCALE_HYPHEN = 'locale_hyphen';
+    private const CUSTOM = 'custom';
+    
     private const PHRASES = [
-        self::StoreCode->value => 'Store Code',
-        self::CountryCode->value => 'Country Code',
-        self::LanguageCode->value => 'Language Code',
-        self::LocaleUnderscore->value => 'Locale Code (_)',
-        self::LocaleHyphen->value => 'Locale Code (-)',
-        self::Custom->value => 'Custom',
+        self::STORE_CODE => 'Store Code',
+        self::COUNTRY_CODEe => 'Country Code',
+        self::LANGUAGE_CODE => 'Language Code',
+        self::LOCALE_UNDERSCORE => 'Locale Code (_)',
+        self::LOCALE_HYPHEN => 'Locale Code (-)',
+        self::CUSTOM => 'Custom',
     ];
 
-    case StoreCode = 'store_code';
-    case CountryCode = 'country_code';
-    case LanguageCode = 'language_code';
-    case LocaleUnderscore = 'locale_underscore';
-    case LocaleHyphen = 'locale_hyphen';
-    case Custom = 'custom';
+    case StoreCode = self::STORE_CODE;
+    case CountryCode = self::COUNTRY_CODE;
+    case LanguageCode = self::LANGUAGE_CODE;
+    case LocaleUnderscore = self::LOCALE_UNDERSCORE;
+    case LocaleHyphen = self::LOCALE_HYPHEN;
+    case Custom = self::CUSTOM;
 
     public function getLabel(): Phrase
     {