Fix MinkContext::getTranslationResources() return type; update checkout action

Behat 4 added ': array' to TranslatableContext::getTranslationResources(),
causing a fatal "must be compatible" error. Add the return type to both
getTranslationResources() and getMinkTranslationResources(); also guard
glob() with ?: [] since it can return false when no files match.

Update actions/checkout to v5 (Node 24 compatible) — v4 breaks on
GitHub Actions after June 16 2026.

Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>

.github/workflows/test.yaml

@@ -41,7 +41,7 @@ jobs:
                       symfony-version: '8.1.*'
         steps:
             - name: Checkout
-              uses: actions/checkout@v4
+              uses: actions/checkout@v5
 
             - name: Setup PHP
               uses: shivammathur/setup-php@v2

src/Behat/MinkExtension/Context/MinkContext.php

@@ -298,20 +298,14 @@ class MinkContext extends RawMinkContext implements TranslatableContext
         system(sprintf($this->getMinkParameter('show_cmd'), escapeshellarg($filename)));
     }
 
-    /**
-     * @return array
-     */
-    public static function getTranslationResources()
+    public static function getTranslationResources(): array
     {
         return self::getMinkTranslationResources();
     }
 
-    /**
-     * @return array
-     */
-    public static function getMinkTranslationResources()
+    public static function getMinkTranslationResources(): array
     {
-        return glob(__DIR__.'/../../../../i18n/*.xliff');
+        return glob(__DIR__.'/../../../../i18n/*.xliff') ?: [];
     }
 
     protected function fixStepArgument($argument)