lowercase directory for iran

Author: Nielsvanpach

lang/Iran/en/holidays.json lang/iran/en/holidays.json

@@ -19,7 +19,7 @@
 
 it('can calculate iran holidays in local', function (string $locale, string $newYearsDayName) {
     CarbonImmutable::setTestNow('2024-01-01');
-    $result = Holidays::for(country: 'ir', year: null, locale: $locale)->get();
+    $result = Holidays::for(country: 'ir', locale: $locale)->get();
 
     expect($result)->toBeArray();
     expect($result[7]['name'])->toBe($newYearsDayName);